Some people love this stroker, some not so much. It didn't work AT ALL for me, and I've got some decent growth. It's a struggle to get into it, because it's so soft. Then once I'm in, I can't get it to stay because the suction doesn't exist. When I pull out, there's definite noise like there was suction, but I felt absolutely nothing. There's ribbing inside but, again, the thing is too soft to feel anything, coupled with a lack of suction. I've tried it without pumping, with pumping, with various lubes (all of them make it IMPOSSIBLE to hold on to), without lube and I've tried every technique that I could. It just feels like mushing room temperature jelly against myself.
I've had MUCH better results by pumping and then using cheap 'tight' open ended strokers that are 100% intended for cis men. I will say the KissX is pretty well made, it's thick and doesn't feel like it's going to tear, but that's where the positives really end for me.