I love it. I'm coming over from the HTC EVO 3D and Nexus S (I would switch back and forth and played with both a lot)
I was rooted on both and was constantly switching roms...
The OG is so customizable when compared to both phones. It almost feels like it's rooted already, imo.
Also, I like LG's UI over Sense.
Battery life was pretty bad at first until I realized that it comes with a setting that automatically connects you to a remembered WiFi spot if you're in it's area.
Once I turned that off, my phone has lasted over a day with average use.
I prefer stock JB camera to this camera. It takes a little getting used to. First couple pictures I took were blurry.
Though I've read in almost ever review that the camera does best outside in natural light.
I'm taking pics of my little boys in a lamp lit room. So go figure, the pics weren't anything to brag about.
I plan on giving it more time though.
I've seen some people complain (in various forums) complain about the screen colors... which I don't understand.
I think the colors on this phone are so real like and beautiful. I'm not sure what they want.
I would play with it at a Sprint/ATT store and check if you like it.
(To add on, it seems like the people who complain about the colors all brag about SIII/Note 2's color. To me... those colors are real like as they tend to be super saturated and exaggerated. I'm more of a fan of the real look. None of that photoshopping look for me)
So overall, I love the phone. Hands down the best phone I've ever owned.
I really hope the dev community picks up momentum with this phone.