I'm using my IPV3 Li right now. I am really liking it, had it for about a month now. Temp control works great - I have nothing to compare it to...yet. I do like having the option of being able to update the firmware, I haven't used 200w on it yet or the Ti feature but I have it now. As for the screen I haven't taken the plastic covering off my screen yet, I did see that in some reviews, but I also got a silicone case for it. No battery rattle on my door either it's a solid built device.