Went from having an iphone 4 which i loved but found lacking for my gaming habits and switched to an Xperia play.
Pros-
Emulators are golden , this truly is the best phone on the market (EVER) to play emuatlors
Android works very well and is current 2.3.3
phone works very well , well built and compares with an iphone 4 in many ways
Cons-
Screen brightness is lacking in direct sunlight
the low amount of memory means updating becomes a chore sometimes , low memory warnings are annoying
the plug in for the phone is in the wrong place and feels like its going to fall out all the time
However if your a gamer on your phone , dont even question it , get the xperia play