The toy does not hold up well. After a few uses, all the silicone pulls away from the metal plating and after a time the Intensity actually sprung a leak if you applied any pressure on the platings- so the air does not stay in. I discovered this the other day when I was cleaning all my toys to pack them. So this means my Intensity will be tossed in the rubbish bin as it would be horrible to use it as you cannot clean inside the shaft (but before I do, I plan on taking it apart to see what makes it tick).
In my opinion, don't waste your money on it. It is a fantastic idea and it did work while I used it. BUT... the toy itself is clunky, it feels kind of cheap, the silicone pulls away from everything and after a few months of use, it is no longer hygienic to use.
Hopefully this is the information you were after, if you have any more questions about it, please feel free to email me.