I've used it to develop multiple applications mostly with android more recently with iphone / ipad as well. I've used angular, jquery mobile, and famo.us to develop apps using this technology. I've run into a few edge cases and have tweaked multiple plugins and even written my own for android. I haven't worked much with objective C so my skills on the more in-depth questions related to ios is my weak spot.
I've developed several apps for clients and I'm currently the top ranked SO for [famo.us] in the last 30 days. It is an amazing framework with a lot of potential. It solves so many of the speed issues with Cordova/Phonegap when properly implemented.