My 60C started losing satellite in a random fashion and customer service had me send it in under warranty with an RMA.
I was without my GPSr for about 5 days, and I was hoping the whole time that I wouldn't become one of those nightmare stories you read about on message forums...
Well, I too have to compliment Garmin. I got my original unit back with a detailed report, updated software, and all of my waypoints/software. It seems that an internal battery connection was loose and had to be fixed. Also, my screen was apparently slightly chipped (I hadn't noticed), and they replaced that for me, too!
I just finished using the GPSr on a 1500 mile roadtrip and it worked flawlessly the entire time.
Go Garmin!