On day 25 of the LG G2 challenge, I'm talking about the only con that I have found on the device, and that's the occasional hiccup with gestures.  The phone is exceptionally fast, and that's an awesome thing.  That said - much like the gesture experience can be problematic with a phone that's too slow, it can also happen when overall speeds are too fast.  At times the overall gesture experience on the G2 suffers because of the speed at which things open.  Having a fast device is awesome, and I'm not dinging that in any way - but there is an optimal speed for gestures, and I find that at times, the G2 is a bit too fast in that department.