By far the best phone I've owned (Droid X and iP4). I used TouchWiz for a few days before installing Nova and have noticed virtually no lag. In my opinion, the HTC One and G4 are very comparable and the differences will come down to personal opinion. I am envious of the aluminum build and was turned off by the plastic build of the G4 until I bought it and played with it. I actually really like how it feels in my hand. The construction strikes a good balance between build quality and portability (very thin/light). I've had the phone about 2 weeks now and still find myself constantly picking up the phone and swiping between screens for no reason other than to admire the beautiful screen.