I have no regrets with this purchase. I think they are a great reminder to exercise my pelvic muscles, and as an added plus they remind me to tighten my abs as well. They are comfortable, functional, and for $7.99 they are very worth it.
The most helpful critical review
More like Wickedly uncomfortable!
I found the balls to be extremely useless, since I couldn't even feel them while I was wearing them. The retrieval cord was very uncomfortable, and the cord going between the two balls was too long. The only good thing about these balls was how easy they were to insert and the vibrant coloring. Beyond that they were pretty much useless.