If you are over 6"in length and average girth, don't buy this. It's very tight and short. The spiraling case does not allow the sleeve inside to stretch much. It was actually a bit painful.
I gave it two stars because I think it might be useful for those smaller than me.

smaller than i expected, not a lot of texture but if you are looking for something with some serious suction to it this will do. don’t bother buying if you are anymore than slightly above average

Got to be honest other ones that felt better. But the fact that I can just slap it out, turn it inside out and clean what mess I made is great. Also this is the only one hole that I can leave in plain sight and have no one touch or even comment on it.

After reading many reviews about the black version being way too tight and almost painful to use I was a bit worried because I had already purchased it. All I have to say is that those people clearly don’t know what they are talking about. I ah well above average, I sit at around 9 inches in length and 6 in girth, sure the toy may not accommodate the length but it still feels AMAZING, I highly recommend this product just make sure to use a lot of lube etc.

This is a fantastic male masturbator. When I first received this, I stuck a couple of my fingers inside to see what it felt like.....omg it is nice and soft, guaranteed to make him blow his load in short order, we loved it. Seems to stay nice and tight on the dudes shaft when I used it on him, a must try imo. Cleans up nicely, and it stores nicely as well. Would recommend warming the inside up first with some warm water prior to use....much nicer warm than cold.