I returned mine 2 nights ago. Back to the iphone 4s I went. Was an easy transition for me. The smaller screen sucks, but at the end of the day its a phone.
I'd be transitioning to the same place....I'll miss LTE the most....secondly the screen. Although overall I think the screen is too big, I personally think 4.0 - 4.3 is the sweet spot for overall usability.