Let me tell you how to find the Holy Grail: Buy this product. DONE. This product goes on so smooth and a little goes a long way. I use about 10-12 drops to cover my entire face and to top of my neck. I do this every morning after washing my face and every night after washing, too. I also use a toner before applying this. I NEVER use a moisturizer aside from the BB cream I use under foundation each morning. I find most moisturizers break me out, but this serum has cleared 90% of my breakouts and over just 3 weeks it has cleared 80% of my dark spots and acne marks. My entire face is more even in skin tone (and I have actually been getting compliments on my skin), and I rarely have to use cover up for blemishes now. In fact, I feel confident with JUST my BB cream and NO foundation now because my skin has improved so much. (I would say I'm confident with no makeup at all, but let's be honest... that would be a lie with or without perfectly clear skin.)

My thoughts: The packaging in small, but it lasts a long time. The glass is dark to prevent sun exposure and oxidation of the vitamin C (because vitamin C becomes unstable and can actually cause skin damage if exposed to too much oxygen). I appreciate the bottle for keeping the product fresh longer. I also think the company is wonderful. I got an email the day I received my serum with instructions and suggestions and then a follow-up email a week later asking me how the product was working and whether or not I liked it. I said that of course I don't like it... I am absolutely in LOVE with this product.
This has vitamin C, Retinol, tea-tree oil and more to banish breakouts, marks, scars, hyper pigmentation, fine lines, and more. This product does NOT give me dry, flaky skin (and like I said, I don't use a moisturizer). I do exfoliate often and I think this has helped reduce the dry skin. Anyways, you cannot go wrong with this product and I will most likely purchase the product for as long as this company is in business (no joke).

EDIT:
I have been using this product for about six to sevens months now. I keep repurchasing from InstaNatural because of the high quality of professionalism, care and the high quality of the product. My skin complexion is one color. ONE color. My blemishes pop up and vanish within three days MAX. Any scars, discoloration, hyper-pigmentation is gone. My skin has NEVER looked better and, even though I'm rough, the beginning signs of laugh lines have disappeared around my cheeks and eyes. I also want to say that InstaNatural's company (from day one of my first purchase) has sent me an email the day my packaged arrives with instructions on proper uses and care. This email goes straight to the personal email listed on my account. I feel as though the company cares about everyone who uses the products made by InstaNatural. I plan to use this for as long as it is sold (or a different product by InstaNatural). I hope this helps everyone!

I've been using this in conjunction with the InstaNatural Glycolic Acid Cream 10%, and it's been amazing! I have very oily, acne prone skin and these two products have been ASTOUNDING. I usually have really bad breakouts on my nose (I look like Rudolph the reindeer most days) and then breakouts around my cheeks. In just three days this cleared up all of the stubborn acne on my nose that refused to quit. I've tried all sorts of brands from drugstore (Neutrogena, Simple, Olay) to high end(Clinique, Ole Henriksen, Korres) to all sorts of strange homeopathic remedies (many a night have my room mates seen me slathering all sorts of ingredients on my face in the hopes that I'll find some sort of miracle cure for acne, ALAS) , and none of these things were able to clear up my nose. It seemed like I was always going through another tube of gunk that claimed to clear up stubborn breakouts (Neutrogena, I'm looking at you). After a fair bit of research, I skeptically read the glowing reviews for this serum and decided to take the plunge. Products that claim to do more than one thing always seem kind of sketchy to me, because in my experience most products can't even do the single thing they claim to do. This one pretty much claims to clear up almost anything that can be wrong with your skin, and boy, I'm glad to say it doesn't fall short on its promises. Just for clearing up my nose this stuff is a winner. It's taken a bit more time to clear up the other areas, but they seem smaller and less red everyday. The rest of my skin that isn't plagued by breakouts looks dewy and bright. I can't really speak for the anti-aging properties of this miracle elixir (I'm 20), but if you have redness or acne of any kind, I really suggest this. I love the fact that most of the ingredients are natural, and I love that this has really brightened up my face and helped reduce the flood of oil that I seem to be constantly dealing with. I use three drops on my face every morning and night, and my guess is that the bottle will last almost three months if I keep using that much. The short term effects from this have been really wonderful, so I'm quite excited to see what the long term ones will be!

UPDATE: It's been 14 days since I started using this serum in my routine and my skin is clear and glowing!!! No more purging. Hands down the best retinol serum I've ever used, and that's coming from someone who has used Rx retinoids/tretinoins etc. Sometimes less (and gentle) is more! So glad I've decided to give Instanatural a chance. Customer for life

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So far I am one week in and my skin is definitely purging from the retinol in the serum (retinol speeds up cellular turnover, so its job is to take out all the underlying sebum quicker!), but aside from the breakouts, the rest of my skin looks so much brighter and feels so much smoother. I am being very patient and waiting the full 28 days skin cycle for the retinol to do its job and purge me, and I am hopeful by that time I will see smooth, clear skin!

I have been using other Instanatural products in my routine for a month now and have already seen such a difference, so I decided to give this serum a chance for my pesky closed/open comedones that still wouldn't budge. I already knew if I started using this serum at night I might purge, but because of the results I have seen with their other products, I decided to take a chance with this serum as well and I'm hopeful in about three weeks I'll see the results I want!

Morning: Vit C cleanser, Glycolic Toner, Vit C Serum, Hyaluronic Acid.
Night: Vit C cleanser, Cerave PM moisturizer, Age Defying & Skin Clearing Serum

Love Instanatural so much!

OMG this is the most amazing facial product I've ever used in my life. Ever.

I have very very oily skin. Within an hour you can practically see the giant globs of oil coming from my pores. So with that, of course, comes the acne. Really bad acne. Plus, I have the wonderful scars from my pickin' days. I'm in my 30s now, so I was getting darker spots that leave little red marks when they're "healed". I'd get cystic acne and it went down mid neck, and it re-occurred. I was miserable so I searched for some hope.

I tried everything under the sun. Murad, ProActive, Neutrogena, Dr. Brandt, a bunch more hoity toity brands, and all led to the same conclusion. So I turned to Amazon and found InstaNatural. Based on the good reviews I first ordered this: http://smile.amazon.com/InstaNatural-Anti-Aging-Facial-Moisturizer-Cream/dp/B00KCTER3U/ref=pd_sim_194_23?ie=UTF8&refRID=1T4ADEY4P26PBRX2VPAY. Unfortunately, this InstaNatural cream broke me out horribly! Bad cystic acne. I gave it a couple of months too. But it was bad. To InstaNatural's credit, they stick by their guarantee. They gave me my money back.

I finally found this stuff and no joke within 2 days my face was 50% better. I used it twice a day. At night only the serum. Nothing else (I usually do the serum and a lotion). In the morning I use the serum and Neutrogena Clear Face http://smile.amazon.com/Neutrogena-Clear-Sunblock-Lotion-Ounce/dp/B004D2C5FY/ref=sr_1_7?s=beauty&ie=UTF8&qid=1435723257&sr=1-7&keywords=neutrogena+sunscreen and that's it.

After a week you'll see some peeling and maybe some random breakouts (maybe even a cyst or two, don't freak out) while this is working all the nasty out of your skin. A couple of weeks later you're looking at 75%. In less than a month, my face was healed! No acne! The little red bumps went away. The cysts went away. And my face although still oily, is LESS oily. And the plus? Well reduced fine lines (no not gone, reduced), some plumping AND tightening of my skin, and a really nice glow! I love love love this stuff.

But BE WARNED. This stuff has retinol so your face will be a lot more sensitive to sun. The Neutrogena sunblock is great, but wear a hat if you're going to be hanging out in the sun for while. You can get burned REALLY easily. I learned my lesson. But hey, guess what? This stuff got those red marks out within a week. I've been using this for about 3 months and the changes have been pretty significant. My skin looks so much better! I have to buy this stuff in bulk it is amazing!

So I wanted to go through a whole bottle before I wrote a review and WOW am I happy
I had to discover my perfect combination, but I think I found it (at least for myself)

I use the Oil of Olay Cleansing brush. I love the brush, but I don't like the cleanser that came with it.
http://www.amazon.com/Olay-Advanced-Cleansing-System-1-Count/dp/B0043OYFKU/ref=sr_1_2?s=beauty&ie=UTF8&qid=1425906789&sr=1-2&keywords=oil+of+olay+cleaning+system

But then I got a sample of Philosophy Purity Made Simple One-Step Facial Cleanser and fell in love with it.
http://www.amazon.com/Philosophy-Purity-Simple-One-Step-Cleanser/dp/B00021C1NG/ref=sr_1_1?s=beauty&ie=UTF8&qid=1425906933&sr=1-1&keywords=philosophy

then I added this serum:
1st: This stuff smells so good. Like a very orange citrus scent that fades after about a minute. I use 3 drops on my face, and 1 on my neck just after a shower or washing my face. It takes maybe 2 minutes and it is completely absorbed. I then put on my sunscreen, I currently use this one https://www.mariobadescu.com/oil-free-moisturizer-spf-30, and I love that line. Then I either put on my make up, or just go without. Either way, my skin has improved dramatically.
2nd: My adult acne near my chin is almost GONE! This is a huge deal because nothing else has worked and my skin is so sensitive.
3rd: My pores are much much smaller.
4th: the very beginning of the wrinkles on my fore head have dramatically decreased
5th: this bottle lasted me almost 3 months using it once, some times twice a day, and using it to spot treat random zits (it works really well for that!) And beauty products like this can be sooooooooo expensive and this stuff is so affordable!

My sister started using it after I told her about it and she loves it too.
I have combination skin, and I wish I found this combo of skin care sooner! If you are some what desperate like I was, it's won't hurt to try it. I just ordered my second bottle and will always always use this serum.