It's made of glass, which works well with any type of lube and is completely sterilizeable. Glass is a very sexy, hard material for sexual play, and it's one of my personal favorites. It's not treated pyrex glass, however, which means that, while it's not going to break from regular sexual use, it might break if you hit it against a very hard surface. Its completely smooth surface will not hurt your tender skin.
I really enjoyed using it on my lover, slowly inserting it ball by ball until it was all the way in. The best thing about this plug is that it really stays in well, whether partially or fully inserted, because of the ball shapes along its shaft. The tapered end leading to the flared base is brilliant because it makes wearing the plug between your buttocks more comfortable and also helps it stay put when fully inserted.
The best things about this probe are its good looks and effective performance. It does exactly what it's supposed to do and looks good doing it.
Because it's glass, it can be shared between non-fluid-bonded partners if it's sterilized in between uses. To sterilize it, you can boil it or wash with a 10% bleach solution. But if you use bleach on it, always wash well with soap and water and rinse well afterward.
It came in cheap-looking packaging that's definitely not a keeper.
My lover definitely liked wearing it, and she's ambivalent about a lot of anal toys so that's a glowing recommendation.