Hi,
Just bought a new 610 for my birthday. After using a Garmin Etrex HCX for many years this GPSr is a breath of fresh air. Took me a while to decide between the 710 and 610 but the price was the big decider, and the 610 still has a camera, voice recorder and speakers. I agree with your comments on how easy it was to pick up, seeing as it does a lot more than a basic GPSr and the paperless caching mode is great......just the ticket when outdoors, however I still carry my Garmin as well, just whilst I am getting used to it. I tried using my fingers to access the menu and screen but they are not slim enough so use a cheap plastic PDA stylus (£2 for 3) which I have attached to my lanyard, much easier/faster than my fingers!!!!!!
With regards to the Demo mode, I managed to turn mine off with the following;
Access Menu (Bottom left corner), Tools Menu, Scroll down and Tap on the Stop Product Demo button.
Hope this helps.