The plastic exterior on the X feels rubbery. It's got a grippy tack that has survived a few solid weeks of greasy hands, and doesn't slide around.
Overall, the build quality of the X is solid. Motorola has pulled off two high-end Android phones -- this and the original Droid -- that really feel good and inspire confidence. There's no give on any of the buttons, the volume buttons aren't loose and broken out of the box like some were on the original Droids, and the grippy plastic makes it feel even better. Having the phone tilt a few degrees and not rest completely flat on surfaces will help prevent the back from getting scratched up.
NEXT: The software
Last updated July 27 2010: 2:43 PM ET