I recently upgraded from my old GPSMAP60csx to a Montana 600. It's a bit of a "beast" but as I ride a Quest velomobile (a fast fully streamlined trike) it's size is not a problem and the additional capabilities make navigation a lot easier. I'm pleased to be able to say that EVERYTHING seems to work well with this site including upload of cadence and heart rate data. I've also tried out route creation on the site followed by direct upload to the Montana and this works seamlessly as well! Great stuff guys! Keep up the good work!
RWGPS and Garmin Montana