I injured my low back 15 years ago and my neck about a year and a half ago. One of the continuing effects of these injuries are continuing problems with my lower pelvic muscles. One suggestion I received was to look for kegel exercisers to strengthen these muscles. I considered Ben-Wa balls but heard too many stories of them falling out at the most inopportune time. My next thought was to look for something that weighed a little less but would still help me achieve the goal of building muscles. I settled on the Smart Balls for a few reasons - first is that I liked the material they are made from, I liked the concept of two connected balls, and they were reasonably priced. I did read the reviews before buying them and decided that these were probably going to fit all my needs. And I will say that I got all that I asked for and more (see below for the unexpected bonus). I ended up choosing the Magenta-Pearly Rose ones. They really are attractive even if I don't see them too often.
These are packaged in a slightly more than functional manner: The front of the package shows the balls encased in molded clear plastic. The back of the package is like a book in that you can open this (secured by 2 magnets) and read about the material and how to use/insert them. The graphics are the usual Fun Factory with bright colors. Included inside is a rather long pamphlet printed in (at least) 6 languages.
I didn't notice any odor to the balls themselves. What I did notice was the sensation of shaking them. Evidently there is an inside ball in each one that moves and rattles. I started laughing because all I could think to compare them to is a baby's rattle although with less noise. They do sound interesting.
Putting them in takes some time and patience. You may need to use (a little, really just a bit) of lube. The balls are just less than 2" in diameter, which some women are going to find too broad for comfort. Also, the two balls measure about 4.5" in length, which again, some women are going to find too long for comfort. It takes some time to get them situated and they do provide a feeling of fullness, which can make them a fun accessory to a romantic evening if you wear them out with a date. They provide sensation and anticipation of what may happen at the end of the date ;)
Once in, they should keep themselves in place unless your muscles need some training. I don't recommend urinating when them in and MOST DEFINITELY not while defecating. Your muscles relax at these times and they can slip out. Trust me, digging in the toilet to retrieve them (and then to wash them off) isn't going to be fun.
Consistent usage will result in muscle development. It does take time and patience to see results though and you need to be dedicated to using them. When in place it does make walking a lot more fun and also much easier to remember to do the kegel tightening exercises. And yes I do enjoy wearing them when going out to parties or on a date because they do provide a lovely feeling of anticipation.
Care and cleaning are really simple: wash, rinse, repeat with soap and water. Yes you can sterilize them by running them through the dishwasher although I'd recommend turning heated dry off. Storing is a bit tricky as the elastomed can pick up lint. Try storing them in a small plastic bag or a bag that gives off little lint.
Although these are safe and nonporous, I am not sharing mine. I think it's just my own preference because they are certainly safe enough to use with more than one person provided you are doing a full antibacterial cleaning after use. Fun Factory says these can be used for anal play and I can see how that might work so here's my suggestion: first is to make sure you keep a grip on/at least a finger through the cord to make sure the anal muscles don't pull the balls all of the way into the anus. Alternately, just insert one of the two balls into the anus. They are certainly broad enough to provide some great sensation.
I will be honest and say that it took me a few times to get used to inserting this and holding them in place. Sometimes I found that one of the balls had slipped out and I needed to go push it back in. I'm glad I was patient because I did notice that there was some better muscle control the longer I used them and now they do not slip out at all.
There is an unexpected bonus to using the Smart balls. That elastomer-covered cord? It transmits vibration well. REALLY well. Try this: take a vibrator and put it through the cord, bringing it taut. That cord transmits vibrations up through the cord and into to the Smart balls themselves. And, since they're resting against your G-spot? Yeah, it's a pretty heavenly feeling.