Jelly Bean is supposed to be amazing, operation butter is supposed to make it flawless, google now, updated os, better batter, btw my battery is amazing, I'll grab 2-3 hours of screen time a day, while having sync on for email, auto brightness, data on, etc. thing lasts me all day on one charge, sometimes on real busy days I'll need to charge a bit later in the day but not much, another thing, it's really not hard to get used to Android, you can tweak it as much as you want, but if you wanna run stock go ahead, you don't have to change a thing, you can leave your home screens blank or anything, it takes a whole 5 minutes to set everything up, getting all your settings correct may take a bit longer, for me it took about an hour because I was multi tasking a lot. I have the Galaxy S 3 so it's expensive has a great battery and is the "best" out there right now.