Mark and Dan- Thank you very much for the info. My Garmin 550 came with my motorcycle, which I bought in November 2009. So, the GPS is at least 3 years old, and I have not updated it since I got it . Since I’m planning on going on some longer trips this year (Colorado, Nevada, etc.), I’m leaning toward doing an update now. Based on Mark’s comments, it sounds like a 3-4 year interval would work. At this point, I am a very basic level GPS user. However, if I run into any challenges using the Garmin, then I’ll contact one of you. Thanks again, and I’ll look for you at future events. As I recall, we were all at the Vermont RA rally with our respective S/O’s. Take care and hope to see you soon. – Craig ’08 LT and ’94 RT.