Some small examples:
On the bike through a tunnel in which I have to turn ... - JAAA something there, for example in Munich - shortly after the tunnel entrance "No GPS reception" With the full message and an OK button. To now the turning instruction to see again I have to confirm what garnicht with gloves of is so easy ...
Other "evidence" are often full-screen and need to be confirmed ... why ??? who can thus come up with a crap and worse still why it is not changed?
Dirt splashes on the touchscreen brought the device to crash I just remove the battery and again had to take ...
On Motorad the device depends on current ignition - entrance to the underground garage ... ... Stop the engine instrument indicates that it shuts down because no external power is available more ... 30 seconds countdown is running - suddenly "No GPS, the message reception "- Now, if this has not been confirmed remains to the unit and sucks the battery is empty - what a nonsense !!!
Lifetime update does not work or only after manual intervention of my dealer on the device manually ... delete the old cards ... etc.
Route planning with 1 or more intermediate goal (s) causing the unit to fall regularly or it shuts down without comment ...
Other motorcyclists have the same problems and crashes - that's not an isolated case or Monday device!
Conclusion: Stay away from the Montana 600 and its successors as long as no comprehensive firmware revision by Garmin takes place.