I'm in the car a lot for work and care-taker duties. My hips and back were feeling the impact. This pillow right here! Not only does it comfortably align my body from the waist down it also give me a few more inches in the seat and I like to sit high. It's good for my mother inside the house when she sits in her favorite chair. It even makes it easier for her to stand.
It's firm but comfy. As the cooling part warms its like a hug for your tooshie!

I was very pleased with this product. It has helped relieve pain when I have to sit for long periods of time for work.

I recently purchased a used office chair and while it felt comfortable while I tried it out, after a few hours of working at home it was killing my back and tailbone. Everything else on the chair was perfect, but the seat itself had degraded and they wanted $200 to replace it.

I figured I would try this first and I'm glad that I did.

Pros:
Not too thick
Firm, comfortable foam that shapes to your body
Ergonomic shaping makes it fit naturally
Great value
Soft fabric
Slide-resistant material on the bottom to keep it in place

Cons:
It is still fairly thick, which means that it will raise you up in the seat and could affect some of the features of your chair like armrest height and lumbar placement.

Very happy with this purchase overall. I even throw it on my kitchen chairs/bench if I'm going to be sitting for more than 15 minutes and it allows me to sit comfortably, which isn't the case otherwise.

I've gone through a myriad of seat cushions trying to seek relief when sitting from very bad back. this isn't it. It's very hard, not thick enough for height requirement. The thicker the cushion the easier it is to raise from the chair. I can use it in the car so I didn't return it.

I got the larger version of the pillow. I first have to admit that the first evening I tried it, I used it backwards! The u shaped pillow is used with the legs of the "u" in the back. That way works better if you have tailbone pain because you sit on it and there's an open space for your tailbone so that it doesn't come into contact with anything. It makes sense when you think about it but I don't always think at first. I felt I should admit to that because I suppose there could be others out there who might not be thinking about it when they first try the pillow out. It won't work for tailbone pain if you sit on it the opposite way and could definitely aggravate it. But hopefully others are thinking more than I did when they first try this. So I normally sit on my recliner and since I've lost 120 pounds, I ended up with tailbone pain. I asked my doctor what kind of specialist would deal with this and she responded that she thought it was probably from loss of subcutaneous tissue and that she didn't think a specialist would be necessary, that it should try a donut pillow. But Amazon has some things that pop up when you search for something that look even better and I chose this one for the description and the price. And the look that appeared to be more comfortable than a standard donut pillow. I've been using it for a couple of days now and I feel that it's working for my tailbone pain because it prevents me tailbone from making contact with anything, which results in the pain I was having. It's a hard pillow but I think it needs to be or it might not prevent me from sinking into it and my tailbone would make contact with the seat of whatever chair I'm sitting on. It's comfortable when I consider the pain I would otherwise be having. I feel this is a good quality pillow and the price is right and I would recommend it to my best friend or anyone else who has tailbone pain.