My 5th handset from Motorola - definitely a great buy.
Compared to iPhone4, some of its differentiating features include:
Corning Gorilla Glass Display
Scratch resistant and super-bright - no additional protective film required.
Android/ Google integration
Effortless syncing of contacts within Gmail & other Google apps.
DUAL-CORE 1GHZ Processor with 1GB RAM
Super fast; everything just loads in a snap
Internal 16GB storage + another max 32GB microSD
Industry-standard SIM/ microUSB connector/ microSD cards
Literally swapped my cables/cards between all my Nokia and Motorola sets and the Atrix was good to go.
Full Adobe Flash and Sun Java Support !
HDMI Output with free cables & media docking station
Perfect for playing back videos in hotels :)
The only letdown was SingTel unreliable 3G/HSDPA connection.
Can't wait to test the phone in other countries with better network speeds.