It has a 27-degree incline to allow for deeper penetration, easier clitoral access, and just ~open~ the position possibilities. Plus! If you have limited mobility, this wedge can help you stay in a position a bit easier.
Promising review: "The cover is wipe-clean and also washable. It's a very short velvet type material which helps stop it from moving on surfaces but also feels good on the skin. The pillow itself is made of high-density foam. It springs back to shape once finished with and doesn't end up with any dips in after long term use.
It's very versatile. There are two angles to use depending what position and height you want. It's great for lifting the hips up and back without stress on the hips for deeper penetration and easy access for oral. I use it a lot with my rabbits and it makes for better orgasms and also shorter reach to the buttons.
It's also useful for sitting up in bed or on the sofa as a lower back pillow. It does have the Liberator logo on the side but otherwise it looks like any other orthopedic pillow so easy to leave lying around.
I'd highly recommend this for everyone, regardless of if they have problems with certain positions and hip movements. It's so good I would buy one of the larger Liberator pillows if they weren't so expensive." —Fabs*