still a good gps. Just don't trust the data base. Airports are still in the same place - if they are still open. Frequencies may have changed, etc.
I still fly with my 600. Too bad I can't get an update for it. Guess that's why I got such a great deal on it back in '09.
Don't know. What's the date of the most recent database you have?
EDIT: I paid ~$250 for mine back in 2009. Updates were still available then, but I never bought one. Think mine has a mid 2008 database. Still useable but not reliable for airspace, freqs, identifiers and such.