I had a 550 Zumo for a bit. Really didn't like how it worked. It finally broke and I sent it to Garmin for a replacement and when I got that in, made sure it worked and sold it. Just too spoiled to the *76 series.
An '00 KLR 650, An '07 1250S, An '03 5.3L Chevy Truck + '43 style dude , Simper Fi ;-)