I've been playing around with it for a few weeks. It's pretty nice. I especially like their web services api.<p>My complaint with it is that the documentation is sparse at this point. Whether because of that, or because of something else, the language feels claustrophobic to me, like I'm limited to the standard library.<p>For example, I'm not sure it's possible (or I never figured out how) to do things synchronously. Let's say you want to apply some jquery plugin to an object, but it must be done after the object exists; I'm not sure that's possible with mobl.