Very slow start-up (sometimes 5-10 minutes to acquire a signal.) This is incredibly annoying when you need to get somewhere and must pull over and wait several minutes for directions. Five minutes seems like an eternity when you're running late. I'm no GPS engineer, but I believe the unit is slow because the antenna/hardware sucks, and no amount of software upgrades will fix this - especially in newer cars with heat reflective coatings in the windshield. (For existence my '05 Honda.) The upgrade from version 3 to version 4 costs $99, so make sure ver 4 is included. Ver 5 will release Dec '05, so wait and see if they really can fix the problem. Bottom line - I'll just buy a Garmin next time. I have not heard of similar problems with their equipment.