This toy is really for anyone interested in nipple play. It is fine for beginners or advanced users, although those seeking extreme sensation may not find it satisfactory. It is also well suited for suction on the clit, possibly even more so than nipple play.

The bulb is made out of rubber. Rubber is a porous material, and is only ranked a 3 on the safety scale; however, it will probably only be touching your hand. I believe the part that actually touches the nipple is plastic. I found it to be odorless. Both the bulb and the vacuum tube are smooth and seamless.

The bulb itself functions quite well. It is easy to squeeze in one hand, and the vacuum tube fits over the nipple easily. The rings stretch over the tube, and can be slipped onto the nipple with ease. The rings are one size fits some. I found them to be way too big, and although they slid onto my nipples, they didn't stay. I didn't feel any sensation from the rings because of this. A major flaw is that there is no storage for the rings. If you store them over the tube they will become stretched out. If you pinch them to stay halfway in the tube, they become misshapen.

I found the suction to be mildly stimulating. It was enough to be pleasurable. But with only one bulb and the failure of the rings, it leaves something to be desired. Some others have mentioned that similar rings can be purchased at the hardware store, and I may look for some that are a more suitable size.

Overall, this toy is better suited for clitoral suction for me instead of its intended use. It could work great for someone with the right size nipples. I tried it on my boyfriend and the rings stayed on fine, but he isn't into nipple play. If you had two bulbs, it could also work well to have one on each nipple.