Just now getting around to updating, what I've seen visually hasn't pleased me yet from other devices I've seen but we'll see. I almost hate to admit how much I like my 4s as I've never been a big fan of Apple products but in this regard my usual dislikes are actually a plus or not applicable. After using an older android phone I switched to the $s and find the OS much better (though I was on 2.2 I think, just bought my daughter a tablet with 4.1 and it is vastly improved) but most of all I find the apps to be much more polished, though this comes at also being larger in file size as well. Also the norm of apple controlling all hardware and software becomes a plus to me in this instance, I though it would be cool having android and being able to mess with it and then I realized I didn't care on my phone. And the non applicable dislike is price, iPhones are pretty much the same price as their competition (at least for contract price) which is usually the biggest turn off for me, thats why my daughter got a Galaxy Tab 3 and not an iPad mini.
Edit: Updated, other than the visual I like it. I liked the "glass" look much better and now there is also way to much white for my taste.