These are best used in the vagina. Actually, that's probably the only way to use them.

This is really suited for anyone who wants to work on vaginal muscles. I've heard of them being used during sex as well, but I've not tried that.

This is not meant to be realistic. They are kegel beads on a loop to connect and pull.
There is very little give to them, and while the fact that they are attached makes it nice for beginners; I would suggest making sure that you are ordering the right kind and have lube on hand.

The reason I had actually chosen these was because of the design. I was a bit terrified that I'd 'loose' one up there if there was no string. I mean, I know you can't loose things up your vagina really, but I didn't want to go fishing either.

I had issues with the size, they were too big for me to use comfortably, and requires very large amounts of lube to get in...and then everything is kinda messy.

These are meant to help exercise your kegels.

I think the design is the best about this toy. There is no fear of having to go fishing or anything. They are are nicely designed, and look non-terrifying.

You need to keep these clean. I suggest cleaning before and after every use. They come in a bag that you can store them in.