Physically this toy is top notch. The packaging is classy and (when I ordered mine, which was about a year ago) included a sample lube from Fun Factory. The internal steel ball makes a soft kind of rolling noise, but it's very quiet and I couldn't hear anything once they were inserted. The silicone is nice and smooth, and a little water based lube goes a long way when inserting. The looped string makes taking them out a cinch (just remember to relax!). The silicone is very firm. The first few times I inserted these it was a very tight fit and inadvertent clenching could hurt, but once they were in I appreciated the firmness. I clean mine with soap and water, no muss no fuss.

As far as kegel exercises go, these were fine. As I mentioned, the first few times I used them it was already a tight fit so I'm not sure how much tighter I got, but they've got a nice weight to them and I was definitely working my kegels more than I usually do when I had them in.

That said, I bought mine because of the reviews that touted them as discreet g-spot stimulation and I found them woefully inadequate in that area (and I have gotten aroused from my menstrual cup hitting the right spot, so I don't think it's me). I love being teased, and when I bought these I was in college living with about 15 other students. The idea of slipping in the Teneo balls and then vacuuming the living room, getting aroused but unable to do anything about it because my house mates were in there studying, would've been a dream come true.

Unfortunately once they were in I could hardly feel them, except as a kegel-stimulating weight. They were discreet and easy to wear "in public" - I walked around, did the dishes, sat and read a book - but I didn't get any stimulation from them at all.

These were the first insertable toy I tried and I wouldn't recommend them for someone just starting out, unless you know the 1.5" diameter will be fine for you (learn from my mistakes!). Because they're egg shaped instead of tapered like most dildos, if they're a tight fit going in, they're just as tight going out. The first time I tried it I got one in past the half-way point (which was a very tight fit and required some deep breathing), decided that was enough for the day and then had to do it all over again to get it out. It wasn't a very sexy experience.

I've only used these twice since my review but I had some new observations that I wanted to add. First, I think I'm not getting g-spot stimulation while walking around because my g-spot is lining up with the narrow bit between the two balls. Second, I accidentally discovered that peeing with these in is surprisingly difficult but feels really good! So if you're also disappointed with these not giving you any stimulation, maybe give that a try.