I bought this when I was about 5 months pregnant as I was getting uncomfortable at night sleeping on my side. I had been thinking about buying one of the full length support pillows as they looked so comfortable but they were all quite pricey so decided to take the plunge and try this instead. Initially I wasn't sure that it helped but then I read the instructions and realised I had been putting it in the wrong place right under my bump. The best way to have it is actually further down under bump and hips. I then also used a spare pillow to rest my arms on and that worked really well, I didn't have any sleepless nights.
The cover is removable and can be washed and the pillow comes in a protective plastic cover so you can store it for later use as well, plus it's small enough to store easily. All in all very glad I got this and saved myself some money!