The Teneo Uno is a vaginal exercise ball. It is a single ball made of silicone. It is designed as a vibration ball that has a hollowed shell enveloping a smaller weighted ball inside. The retrieval string is also made of silicone. There are some slightly ribbed patterns in a contrasting color around the body of the ball. There is a hollow spot between the strings where you can place your finger tip to push the ball into your vagina.

I own both the original Smart Balls and the Teneo Uno. The Smart Balls is a two-ball design. Since I have a tilted uterus, I had a hard time keeping the Smart Balls inside me properly. The linked balls keep slipping down to my vaginal opening and the protruding point where the nylon string attaches to the Smart Balls keeps scratching my labia. It is so uncomfortable that I decided to leave them in the back of my closet after two tries. With the Teneo Uno, all the problems I have with the original Smart Balls are none existent. Since the Uno has only one ball, all I need is one simple push with a small drop of none-silicone lubricant and the ball will go right in and stays comfortably in the position I wanted it. The soft and stretchy silicone retrieval string of the Uno is constructed directly from the ball so there are no protruding parts rubbing against my labia lips.

Disappointments with the Uno: Although the Uno is meant to be a stimulation toy, I do not feel the vibration of the inner ball. I tried to shake and jump while I was wearing the ball and no vibration was being felt. The ribbed patterns on the body of the ball also did not provide any sensation at all.

Although the Uno does not provide any fun stimulation, it is still a good Kegel exercise ball. If you do Kegel exercise with the ball inside, you can get a good hang of how well your muscles are working out. The Uno is also ideal for ladies with a weak bladder. I have a weak bladder problem, after exercising with the Uno for two months, my bladder is stronger and I do not have any more leaks while I cough and sneeze.

I have not touch my Uno for a while. Although it helps in strengthening my Kegels, and is the only ball-type exerciser that stays put inside of me, it does not provide any pleasurable stimulation to my vagina. In order to keep my Kegel muscles in shape without the assistance of any exercisers, my current method is doing 50 squats daily.