I update my maps when it pops up on the screen, unit is about 3 years old, have no issues.
I have the disc mounted to my dash with HD Velcro, as the flat disc don't like the slight taper in the dash. No issues with the HD Velcro.
I put it on the dash 3-4 times a week for my P/T towns, and leave it mounted a lot more than I should.