For long a person sitting at a desk, this cushion allows without realizing to let his pelvis move very freely while sitting. At first it is a bit special but you soon get used to it. Since I use it, I have less sore lower back late in the day. It is discreet. Highly recommended. I've pumped up a bit more than the original. It's very easy even if you have a little scared at the beginning of the piercing.