Too small for the average person.
The photos on this listing are quite deceiving: this is too small/short for the average adult pp. It's as long as a bank card. Because it's so small, it grips me too tightly, and the inner texture becomes too much. It does stretch to my full length, however it clearly won't last much, and stretching it only makes the texture feeling stronger. It would be much better if it had more length and more weight to it. Fortunately it's reversable - I am only able to properly use it if I switch to the non-textured side. And even then, it's not really that good.
There are much better products on the same price range. I'm not sure who is the target audience for this one.