Ok I dont claim to be a pro at this but ill give it my best shot. I have noticed some things people have been asking about. Heat: I saw some people said it ran hot. In my opinion it runs a bit warmer than the 2nd and 3rd gens but not alarmingly so. It has to run warmer as its running alot of better hardware plau the 2 cameras. Cameras: I think they're great. The videos very nice, still pics great for just shooting around. I would say its worth the upgrade for the cameras alone. It adds so many awesome features. Screen: The screen is amazing, no it does not have the same IPS as the iPhone 4 but i think the viewing angle is improved. The LED backlighting is great to. Over all providing a bright crystal clear image. Speed: The thing is very snappy. Opens apps very nicely, handles multitasking tidily with no lag. No complaints here. Backlight leaks: I have not noticed anything like this on mine and iv'e had it in a dark room too. Tight Sync Cable: Yes it is abit tighter than before but after 2 or 3 times in and out its easier. Speaker: I think the speaker got a nice upgrade. Not bad quality. Louder atleast in my books. Battery: I just got gaming for like 3 or so hours straight while jamming with earbuds. This in as of it self proves the battery has improved much. It was wore down maybe like 65 or 70% of the way. If there are any other q's let me know and ill try to get them answered.