It's nice to see finally Apple accepted this fact - size matters.
iPhones are always one of the best. Facetime is a great app to check with customers from time to time. (And calling abroad with my family, too.)
One of the great new feature is better camera - and multiple images it can take (select the best one from them.)
Cons - not all apps are on Apple (though I also used Google Hangouts with some of my clients). Google Maps could be easier on Android devices.
Overall - it's APPLE!