I have been looking for a Zumo gps for quite some time. Read threw reviews and looked at different units and am just as confused as I was a year ago. The general consensus seems to be that they are over priced and prone to many issues. W/the ability to use a memory stick, Ipod or phone for music I don't see a need for a music player, don't need traffic updates or weather, the tire monitoring system would be nice but not a necessity for me. I have been looking at the refurbished 665 , 550 and even the 590. Will have to make a decision soon.