I really like the minimalistic approach of backbone and it is what has draw me to this framework. Unfortunately the only thing I really miss from backbone is memory management. It really piss me off to have to use another framework just for that.<p>I currently learning it the hard way with a mobile app/framework I created. My biggest problem is managing views cleanup, beside that I find that backbone provide me with what I need to create a simple app.<p>The other thing is, when you start creating an app with backbone for the first time, you really don't know what lies ahead as far as memory management goes. It's really not something you expect to have to debug that at 3 weeks from launch.