After having the G4 for almost 24 hours, I can say that I really enjoy it so far. One of my biggest questions is, how well does it play music/video over the single loudspeaker? I must say, it's remarkably clear, and much better than my Droid Mini was. It had a loudspeaker on the back of the phone, so the volume changed quite dramatically depending on how you were "cupping" the phone in your hand. The single loudspeaker on the front of the G4 is mighty impressive to me.
Other parts of the phone are agreeable to me also. I like the subdued styling (I'm not into "bravado" with my phones), I like the super vibrant display, I like that it's already compatible with nearly everything else in our house (micro USB), and I like that it takes an SD card, so I can expand its storage as much as I want.
The potential lack of OS updates is fine with me. If they update it to a good image of Android 7, that'd be fine. But I was actually quite pleased with how KitKat ran on my Droid Mini, especially in the midst of reports of a bunch of screwed up Lollipop updates, some phones waiting for 5.1 to update because 5.0 was such a mess, some phones waiting for 6.0 because they couldn't get 5.x right, etc. 6.0.1 is what's on it now and it runs sweet. Even if that never changes, I'd be a happy camper.
Activating it was a cinch. It seems that all I needed to do was remove the micro SIM from my Droid Mini and pop it into my G4. The G4 is marketed as taking a micro SIM (which it does), but the SIM tray is actually double-sided, so you can flip it for a nano SIM. That's pretty smart.
For being into this phone for about 100 bucks plus tax, I feel like a thief.