How does this match up size wise to the D1?
Much larger overall, similar thickness.
Are the user features similar/same as the D1 ie notification settings/sounds/lights?
Very similar.
How is the camera? Better than the D1 I hope.
Its amazing in my opinion. I came from a Droid 2 and the camera is not even comparable.
How does it compare overall to the Rezound?
It crushes it in all ways.
Call clarity?
SPECTACULAR. Huge upgrade over my Droid 2.
I dont really need the keyboard, but the Rezound is a bit bigger than I'm acustom to, and I dont like alot of change.
If you don't need the keyboard, there are better phones out there. Droid 4 are for people who require physical keyboards.