I ran both 1 and 2 for a few weeks. I didn't find either of them all that "unstable". I did notice however that 1 runs a lot smoother than 2. With 2, my app drawer would take some time to populate the app drawer several times a day. And, I'm not entirely sure about this, but it seemed to lag my phone in general; my browser was a little slower and always refreshed whenever I reopened the browser, and Maps was a bit slower... taking quite a bit of time to track me with the GPS. Maybe it was a fluke, maybe not, but I switched backed to HL1 yesterday and haven't experienced any of those hiccups.