As a smartphone fan in general but predominately a Windows Phone user I have to say, hats off to Apple. This is the first time in a long time that I feel they've focused on improving features that are already there rather than adding a couple minor features and calling it new. I don't think that any mobile OS has ever offered an update anywhere near this compelling and that's tough to say. If I could get used to the tiny screen and the... aesthetics of the UI, I might consider using one as my daily driver for a few weeks. Either way, I'll be updating my 5S and you can rest assured you'll have a review from another mobile OS's fanbase really quick that isn't just going to be unrelenting hate (Provided there's not another Apple maps fiasco.)