The MAJOR drawback for me is the camera. 20 photos and a 3-second video when you press the shutter button? That's cool and I all, but I only take videos if I NEED a video... I don't want little 3 second videos scattered around my phone, along with 20 pictures from that timeframe, Just seems... Overdone. Hopefully there's a way to go back to stock camera functions. The Sense 4+ camera is perfect IMO.
Other than that, I think I'll look into getting it, since AT&T owes me an early upgrade after sending me SIX consecutive defective One X's.