Boo - I am loving XCom on my iPhone 4S (cramped at times but perfectly playable), but I ran into a save corruption on my ironman run that destroyed my entire progress in the file.
I'm restarting and playing non-ironman so I can make backup files on my own. Not sure if it's just my phone or a bug, so Ironmen beware.
In terms of comparison between console XCom and the iOS version (I played 50+ hours on 360), the graphical details are obviously lower (textures way lower-res) and there are no killcams or "enemy spotted" mini-cutscenes, but otherwise it's a very well done port IMO. Framerate chugs in spots but I am honestly surprised it runs on my 4S at all. not having the color customization is my bigger gripe.