Summary: I just found out that my friends SPIII deluxe unit died one week before mine went on the fritz. Both units were ~20 months old. Mine is ignoring key inputs. His died by failing to power up despite the choice of power source. The only consolation is that Garmin is willing to fix them for $225 each.
Summary: The Garmin StreetPilot III Deluxe Package provides you with the basics of a computerized navigation system. We use it in our family van. Our van has the necessary dashboard space for placing/mounting the unit.
Summary: Some of the things I didn't know. You do have to pay for upgrades to the maps you've already paid for, I had read you didn't. It doesn't reroute well. If you miss a turn because the GPS is off your on your own, it takes the unit too long to catch up. It doesn't do well unless your on the Hwy.
Summary: Navigation for the most part works OK, although sometimes when you cross another highway the software gets lost. The real problem is its primitive user interface. Being a software developer myself I was able to install maps but it is not an experience for the faint of heart.
Excerpt: The Street Pilot III is one of Garmin's earlier in-car satellite navigation units. Since this they have given us the Street Pilot 2610, 2620, 2550 and 2650 - all with a few advantages. The SP3 Deluxe gives us the benefit of having all the European maps at street level come with it in the box!