Just that iOS 7 feels a little unpolished compared to previous versions. I've noticed my signal isn't as good as my previous iphone. Plus I've had a few random reboots for no practical reason. That price plus being open on all carries out the box is a deal, minus vzn though.
I'm hoping with the new NFC hoct card emulation, paypal can implement something like NFC transactions in their Android app. I have no idea if this is possible or not with the non-secure NFC being used i the N5, but it'd be nice.