In nearly every reveiw I've seen, the Element has gotten excellent marks for it's tight handling and minimal body roll. I don't know if this guaruntees actual rollover resistence, but it can hurt! I remember one review saying "you'd have to enter a corner pretty darn hot to unsettle the Element."
When we were at the dealership, talking to our salesman about the E, he asked one of the other guys to come in and talk to us. We had already put money down on our E, and were just working out the details on the options. Anyway, the other salesman came in and told us he had a chance to take the Element prototype out on Honda's track. He said as much as he tried, he could not tip it or even get it up on 2 wheels. I doubt that very much. I know if I tried hard enough, I could get it to flip, but that is just me.