It seems like so many of you all, have been on some rather old phones. You're going to be amazed with Verizon's 4G LTE.
Personally, I would not be preordering to update from my ThunderBolt at this point if it were not for locking in my unlimited data.
This should be a worthwhile upgrade for me, I suspect it will be a great phone and all, but I would have preferred to wait for something more like the Galaxy Note 5" screen on Verizon.