I too am taking my G2 back for the N3, i had a G2 i got from bestbuy when i came out. the battery was horrible, and the camera was slow at snapping shots, not good at low light. i took it back. then (yes i' crazy) a week later got another G2 from verizon. this one was much better, battery all day, and camera was better. The issues i have with the camera is it still seemed slow with moving objects, and real slow with flash shots?? yesterday i noticed when zoomed in on a shot it didnt really focus...weird?.
I played with an AA&T G3 at bestbuy and the camera seemed snappy and focused real quick, like the S4 (which i also had) i also don't like having to switch modes on the G2 to get burstmode...on the S4 & N3 its able to turn off/on as a setting, not a different mode...i also really liked the drama shot on the S4/N3...just my 2 cents....