I'm considering buying one in a few months ($450 new, or $350 used with T-Mobile right now), but reviews have either made it seem really, really good, or really, really bad. Does it still perform well, does it heat up as bad as people say (if it runs cooler than the Exynos 5433, all will be good. That thing will burn a man), and is the battery decent? Basically, how is it with things of that degree (no pun intended), as well as any other additional things you may have to say/think about it?