I bought this kit to serve as a greenhouse and pen for my ducks during the day. No pieces were missing or damaged. Setup was done by my teenage son and myself, though with some patience you could do it alone. The instructions were mostly clear and easy to follow, and each piece was labelled by number so there was no confusion. There are many positives and few negatives to this item, and I plan to buy another one in six months if this one works out fine. This would be a 5-star review if not for two issues, which I explain below.

Pros:
Price is good, setup wasn't hard, size and height (I'm 6'6" and can stand just fine inside it.), plastic cover seems sturdy, plenty of tie downs and Velcro to hold the cover to the frame, large door, lots of windows for breathability, cover fits the frame really well, and it warms up quickly on a sunny day.

Cons:
Only two. 1.)The included equipment to tie the greenhouse to the ground will not hold it down unless you have no wind at all. I used two earth anchors which the frame easily connected through to secure mine down to the ground. I also tucked the bottom flaps inside the greenhouse and used metal tent stakes to hold them down on the inside. Keep in mind, though, that the cover is very well secured to the frame. 2.) The frame itself, even when fully tightened down, can balloon out in the center. I pounded in small stakes near the center of the frame to keep this from happening.

Tip: When putting the cover on, do the bungee cord tie downs first and the Velcro straps last.
Thanks for reading!

May 20, 2021 update:
Customer service was very responsive and had a replacement greenhouse in the mail by the end of that week, arriving the following Wednesday. It's hanging out in the garage right now while it waits for us to have time to put it up.. Also, 3 upright arches from the previous greenhouse are still in decent shape, so we're going to try to add it to the end of the new greenhouse, making it 30'x10' instead of 20'x10'. We're also going to run more wire across the top to prevent pooling. When we get it all put together and tested out, I'll take pictures and update this review on more time. Adjusting this to 4 stars currently because of how responsive customer service was (less then 24 hours for a response) and how quickly they got a second greenhouse to my home.

April 29, 2021 update:
We had a very moderate rainfall and the whole greenhouse completely caved in! Unsure yet what all has been lost.. I dont have time before work to sort through the wreckage and fine out, but I know the losses are likely heavy. We had 16 tomato plants, 6 cucumbera, multiple squash.. I had also just moved dome of our container fruit bearing bushes in.. I'm devistated. Contacted seller and waiting to see if they will assist at all. Will update.

This is my new favorite thing I've bought off Amazon! It's the best. Easy to assemble if you can follow a simple diagram and really nice and spacious! We bought a 25'×15' tarp to stake down for flooring and lined the outside with rocks to hold the cover down. It's great! We had gusts of 35mph yesterday and with the door and vent windows open to relieve some pressure it made it through like a champ.

Only suggestion I would make for improvement would be to make the screens in the vent windows removable so I can give pollinators like honey bees more options to enter/exit then just the front door. Or, make the back have a door so I can open it to pass through. :)

The plastic was cut and sewn short on one end so the door is not able to zip closed or even be pulled completely over the frame. I plan on building a solid end on it so I can compensate for this problem. Your must make many additions to stabilize this. Tie downs wratched to the ground, extra supports inside along the center purlins. If you are handy this is a good deal. Be prepared to spend more to safely shore it down and keep your investment from blowing away.

We bought two of the 10x20' 'ers and for the most part are happy we did. We live in an area where Spring comes late and Fall/Winter come early. Plus our summers are extremely hot (100+).
My only gripe is that if you don't have them perfectly square, the zippers are hard to zip, after one growing season the ties for the windows disintegrated so we have to use clips to keep them open and it would be nice if there was a window or two or a door at the opposite end from the door so there is a possibility for ventilation all the way around.
Otherwise, these have made our growing season incredible! I have never been able to grow heirloom tomatoes like this in my life. Very happy about that.

As with any purchase, I always read the reviews. Like with most products there are both good and bad reviews. It's all in what is important to the buyer as to what they want out of the product. I purchased 2 of these greenhouses to extend my gardening season and to control watering (not over watering from excessive rain).

I took recommendations/ideas from other reviews to make structures sturdier as I didn't feel confident they would withstand storms once completed. I assembled both greenhouses by myself and both at the same time rather then one after the other. It would have gone much smoother and taken half the time with two people. Instructions were ok, but could have been clearer on points that had 3 poles meeting and bolting all together (found myself unbolting several times to add third or supporting pole). Otherwise, construction wasn't bad, but does take some common sense.

I wanted more height for tomato plants and more stability to frame, so I zip tied the base to cinder blocks. The cover was loose and sagged on top allowing for water to pool. To fix this, I placed a couple 8' tomato stakes in v-shape in the end and middle with a connecting joint to hold another stake horizontally down center like the support poles in kit. Worked like a charm in down pour with no water pooling on top! I did also put pipe insulation around poles where covers were loose to fill it out along upper sides. Greenhouses stays on average 20-30 degrees warmer when doors and windows are closed up.

Bottom line - I am happy with my purchase and feel it was well worth the investment. I didn't give 5 stars as I felt it did need modifying to be confident in stability.