As a regular butt plug the B Ball Uno wouldn’t be so bad, but I still have some gripes to get off my chest.
Silicone is of course an excellent choice for anal toys as it’s non-porous and easily sanitized, and it’s better than steel or glass in the sense that it’s not freezing when you first touch it and the toy can be fairly lightweight. However, Fun Factory chose a silicone finish that creates a lot of drag on the skin, even when a ton of lube is used. This is especially important for butt toys because the butt doesn’t self-lubricate, and in fact absorbs fluid quite easily and can quickly dry up. In my past experience, the shiny finish on silicone allows for a little bit more slip, and I think the B Balls could benefit from that.