All I can say on this one is to try and choose your liner carefully. I would have expected a vortex to be nuclear, but it was a disappointment compared to my original choice. The speed bump is supposed to be a stamina builder, but, when you get older you tend to be able to hold off longer. The one thing I will agree with is when you get to the time of blowing your wad it can be a level of orgasm that has you panting even when you normally don't particularly if you edge with it. It can be mind numbing!