It comes in amazing colors, too!
This is a pretty sizable ball - 1.5 inches across - so it's not exactly something I can pop in unprepared in the morning on my way out the door. I have to be pretty turned on to start with to get it in place easily - which is a little odd for something touted for "maintenance" rather than part of masturbation. Though the silicone itself is soft and velvety, the core is rock hard, so there's no flex to the body. A little lube goes a long way to making this easier to use, but I still got a lot of resistance, mostly due to the ridges. But that little dip on the base of the toy? WAY more helpful than I'd ever expected. Having the indent makes it much easier to insert without having to worry about my finger slipping off and stabbing myself in my labia.
Another thing that's way more awesome than I could have imagined? The silicone string. It's soft, flexible, and not at all poky. The best part of all for me is that it's long enough that I can pull it forward once I have my ball in place and kind of "wrap" around my clit - so I get a little dual stimulation with every step. And when I give that little string a tug? Perfection. It pulls the Uno up against my g-spot and slides the string across my clit.
The inner ball creates small vibrations which are easy to feel in my hand, but once the ball is inserted they're not very noticeable. At least, not when walking around normally - more exaggerated hip sways get the inner ball really rolling, but unless you're going to be doing lots of belly dancing or hooping they probably won't come into play much. Where this ball really excels is g-spot pressure - I don't even care that I'm not getting the little rolling buzz because the shape of the ball is so wonderful. With the Uno set in just the right place, the little ridges rub and exert pressure across all the right areas and makes the ball do its job - it keeps me very aware of my muscles because squeezing them just makes it feel even better. It's not the effortless, "you'll do it naturally with no thought" type kegeling that the summary mentions, but I don't think any ball is really going to make that happen.
For the most part, I just use the Uno at home when I feel like doing kegels and playing tug-o-war. I get much, much more out of being able to squeeze my muscles and freely tug and pull the string for resistance. I haven't actually spent a lot of time wearing this in day-to-day situations, partially because it gets me very wet (which can be awkward) and partially because after more than 45 minutes or so it starts to get uncomfortable. I think it's just a little too large and textured for me to keep inside when I'm not already turned on.