If you do any kind of distance riding on a bike, the GPS is the best thing since sliced bread. They're great to have in the car too.
I've got a Garmin 450 on my Kingpin. It's a lot cheaper than the 550 and still gets the job done.
At first I was afraid I would be a slave to the GPS. But if you're programming a complex route into it with the mapping sofftware, you quickly realize it is a slave to you.
We took several road trips with the Garmin and it really works great.
And the best part is, it's got an on/off switch for those days you want to do your own thing.
Get one, you won't regret it.
