This is the first phone I have owned that keeps a rock solid 3g connection at all times at my house. The signal in my house is very strong, so it has never been a weak signal issue... my other phones would just decide to stop using 3g and switch over to 1x. I know all the tricks to rock the phone back into evdo, but most of the time it would take a battery pull or some other combo of tricks to get evdo back.
My dx2 has been perfect with regard to evdo signal integrity.
I really like the faster processor speed, which is most evident when using the camera or the camcorder. Its focus and takes pictures more quickly than the original droid x. The camera is faster in all respects, and it is also better at taking shots in lower light situations. The camcorder, backed by a faster processor, shows no lag even when moving the camera quickly. Playback is smooth. Very impressed with that. There is no longer any reason not to use the camera phone and the camera camcorder, they work beautifully.
I do not like the new gallery. The facebook pictures showing up as the main focus in the gallery is obnoxious to me. I have not figured out a way to change it so that my pictures on the sd card are what shows up instead of facebook updates. There doesn't seem to be a way to change this. I have also noticed a little bugginess in the gallery. I have had a reboot happen while using the gallery... not sure if this had anything to do with Advanced Task Killer or not (no longer using ATK).