What makes this one of my favorites is that it's waterproof and especially, the texture of it. It's velvety-soft but also very smooth and not glossy; it feels a lot like soft skin. Furthermore the size is about perfect for me - it never hurts upon entry and the length is just right (about 6-ish inches long). I often don't even need to use lubricant with it. My only gripe is the button on the bottom used to adjust the speed; I'd much prefer a slidey thing on the bottom, or at least something that doesn't require pressure to adjust. However, that's a very tiny detail. Have had it a few months and love it; it's one of my favorites and I use it very frequently.