The day after the iPhone 7 launch, I walked into an Apple Store in Miami and picked up a matte black 7+ 256GB. Coming from an 6+ I was shocked at the speed increase, but having never tried a 6 I decided to sell the 7+ and picked up a fairly readily available 7 in Jet Black 256GB. The portability was amazing, but I just couldn't deal with the battery life. I had to leave the phone in low power mode constantly just to get through the day. I'm a pretty heavy user, lots of emails, slack and web browsing. So I returned it for a matte black 7+ 256GB. After half a day, I'm still at 80%. On the 7 I would be below 50%. I will say - there's a huge huge difference in reception between the AT&T model and the SIM free model. I will never buy a locked iPhone again. I know the chips are different, but I didn't realize how dramatic the difference is. In places where my AT&T phone would get 1 bar, 4G or no service, the sim-free version can maintain either LTE or downgrade to 4G. Anyway, just wanted to post my $0.02 in case this helps anyone.