Thoughts on my G5 after a few days of using it:
Quick charge is awesome - the battery life isn't quite what it was on my G2 that it replaced, but the speed of a recharge makes it a wash, IMO.
Camera - a lot of people are calling the dual cameras a gimmick but I love it. Most phone pictures I take are within 3-8 feet anyway and the dual cameras work great to take a lot of real estate in that short of a distance. The quality is also clearly superior to my G2 - and the response when I click to capture an image is pretty snappy. It's still brand new so we'll see if it stays that way in 6months+
Interface - I don't like that there's no app folder. I just don't. They should've presented it as an option to use it or not. My apps are in a mess of folders now that I'm having difficulty organizing efficiently.
Looks - I don't like it when people rate a phone based on its looks. That said, as far as function, I really wish they'd kept the volume buttons on the back, with the power button. That was one of my favorite features of my G2
Audio - the speaker is pretty awesome, compared to the G2, it's much louder and you can actually hear "bass" from it. Unfortunately, certain types of music get distored at higher volume, but not excessively. The volume seems to be almost comparable to my Nvidia Shield K1, though at max volume is a bit less clear, which is to be expected given it has 1/2 as many speakers and they're smaller
Overall - Not a bad purchase for the $500 new I spent on it. I think I'm glad I went this route over the S7. I love Samsung products with the exception of their phones, starting with the disaster that was my Galaxy Nexus.