I've tried it out a couple of times, it's tight but not overly so, it just isn't for me.
The material is fine and the vibration seems ok.
Came with batteries which is always a plus.
Bought this to go with a stronger bullet vibrator that I already had and it is great. Stays in place well, whether just on the shaft or also around the balls, and super easy to clean. Bullet that came with it is alright but I like something with a bit more kick. A hit both for solo play and with a partner.