I have had bursitis and sciatic pain every morning for the last 4 years at least. I have tried everything including shots in my back. After getting this belt I have not had any pain. It is awesome and I would recommend it to anyone that has hip/bursitis/sciatic pain. It is also very comfortable. No problem sleeping at all.

[Edit 07/2022]
Upgraded from 3 to 5 stars.
I stopped working out when the pandemic started, and was able to mostly ignore my SI joint. Sure, it still hurts in some circumstances, I have to be very careful about the chairs I use when working for hours, and I know it's going to hurt when I walk for a long time, but day-to-day, it was ok.
I started working out again a few weeks ago, and remembered I had these belts, and decided to try wearing them more often than I used to. Been wearing my Vriksasana belt all day, and at night. It really, really helps, but it's still too big and too flexible.
Since they now make a smaller size (yay) so I bought it right away and have been wearing it for a couple of days. The first one was good for that usage, this one is miles better.
First, it's smaller, so I can actually tighten it correctly. It's also less flexible, providing more support. The elastic bands are different, there is now two on each side, crossing each other. Those make a huge difference and the belt has a much better support than the old one did. I can feel the difference as soon as I put it on - my back stops hurting, my sacrum stops popping.
I've worn it at night twice now - it didn't move. The old one tended to ride up an inch or two, this one didn't.
I also wore it for a run today. Again, super comfortable, didn't move, didn't ride up, and I could feel the added support. My sacrum, my hips, and my lower back don't hurt at all, which they often did before.
Lastly, since it's smaller, it's also a lot thinner because I don't have four layers on top of each other anymore (two layers of the belt, and the two wings). So it's much easier to wear underneath my clothes so I don't have to take the whole thing off and on again every time I go to the bathroom. Also, no more weird bulge around my lower belly. It's extremely comfortable to wear against the skin, and doesn't make me sweat anymore.

I've tried numerous SI belts. All had pros and cons. The Vriksasana was in my top 3. This new improved model, in a smaller size, is easily number one.

Get one.

[OLD REVIEW 2019]
I have had SI joint issues (left side) and pelvic instability for a few years. I started wearing the Serola belt, and found that this is exactly what I need, both at home and in the gym. I Bought this one in addition to the Serola because it is wider and I thought that would be better for wearing in certain circumstances, when I find that I have to wear the belt a tad higher than what is normally advised (when lifting weights in the gym, I wear it about 1/2 inch higher on my hips than I do when just sitting around at home).

Comparing the two belts, here's my pros and cons:

Pros
- it is wider, which is good for me, both for my usage as stated above, and because I have high hips. I can wear it as advised (aligned with the hip/thigh crease) and have it cover and support my hip bones.
- it is thinner, making it easier to wear and conceal under tight clothes.
- it is more flexible (see cons) and softer, more comfortable

Cons
- I'm a woman, tall (5'11") and my hips are about 40.5". I ordered the Regular according to the chart. The belt is almost too big. The sticker confirmed I received the right size. I have to tighten it to the max, both the underlayer and the compression wings, which I have to velcro one on top of the other. Still, I wish I could tighten it more. As a result, it does not give me as much support as the Serola. There is only two sizes, so if you're an average sized woman, smaller than me, then I advise you to look elsewhere.
- The material (neoprene), while pleasing and soft, makes me sweat.

Overall, this belt is more comfortable than the Serola (except for the sweating), but less effective for me. It'd be better is it were smaller.

I purchased this belt 3 years ago. I wish I had used it on a regular basis, but I must admit I did not. I was very sporadic in using it (don't ask me why...dunno). I am a 77 yr old senior who has had back pain for approximately 30 years. The pain is NOT in my lumbar spine, it is off to the side a few inches, yet NOT in my hip. I cannot tell you how many chiropractors, md's, and physical therapists I've been to. Have had MRI's and CAT scans. Have received scripts for multiple pain meds (which I threw away) because I was told it was arthritis. I can go on & on, but I won't bore you.
I am a fan of two Physical Therapists on YouTube - "Bob & Brad". Due to their expertise, and their ability to explain in a way that I could understand, I've come to realize that the problem is NOT in my spine, it is my S.I. joint, (Sacroilliac).and that the cause, in SOME women, can have to do with pregnancy....although men can be afflicted too. My first child was 8 lbs, my second was 9 lbs. I am not a large woman. I'm only about 5' 1". The pain did not occur immediately after pregnancy and childbirth, it came on gradually as I got older. I'm sure that is why we didn't realize what it was and what caused it.
After watching one of B & B's videos, I bought this belt in 2020. I wore it sporadically, and it helped, but I was not diligent in wearing it as much as I should have. Now, in 2023, I realize if I had worn it on a regular basis, I'd be much further along in recovery. I got to the point where I was using a walker or a cane to get around. I could not stand for long periods of time - about 15 mins., and the pain in my back causes me to have to sit down. About a month ago, I happened to come upon B&B's video again, where they mentioned the BELT, and I thought, "oh, yeah, I bought one of those".
I started wearing it every day, and I'm feeling 85 to 90% better already!
As you can see, I HIGHLY recommend this device!! If you have lower back pain, buy one and wear it....not sporadically, but on a regular basis! If the problem is a loose SI joint, you'll feel the relief instantly!

I have been using this belt for nearly 2 weeks all day and night and I feel the difference in the pain level. My PT explained why this works in stabilizing my back. All of my new exercises are geared to stabilization. This SI joint problem is very painful but at least I can walk now with controlled pain. I highly recommend this device. My only negative is the times I have to remove it to use the ladies room!!

This product is highly rated and it deserves it! I ordered it and received it in less than 24 hours. It fits snuggly, I bought the extra large and I weigh 165 lbs. I recommend it to anyone with SI joint pain.