i preordered the 6+, used it for 2 days and it was way too uncomfortable for me to hold. loved the screen and everything else about the phone but just couldn't use it comfortably. so i went to the apple store and grabbed the iPhone 6, sold the + for $100 profit. i used it for a few days and i had the same issue. the 6 was, too, uncomfortable to hold. why? it's TOO thin and the back is slippery. i dropped it on my macbook pro which caused a small dent in the phone (not my mac, which shows you the quality of this aluminum). anyways.. i got a silicone case and the phone is usable. so now i'm wondering, did i need a silicone case all along for my 6+? next time i'm at the mall i'm going to put a silicone case on the display model 6+ (since they have silicone cases that customers can try on) and see how it feels. however, i'm going to try and hold off on the 5.5" display for now. i love the 4.7" display but of course wouldn't mind the bigger battery since i'm a heavy user. conclusion? stop making phones thin as paper, it looks good but it's not practical. FWIW, i'm 6'3" and my hands are somewhat big. i think this is the case for many people who had to downgrade to the smaller size. it's not the size of the screen, it's the thinness that's making the phone impractical for day to day use with one hand.