I bought a Tom Tom Go 920T, The mount on the unit detached from the window of the car and the unit fell to the shifter on my vehicle and shattered the screen, knowing it was not warrantable, I called Tom Tom for repairs. Guess what they do not repair the units at ALL! and if you take it to an unauthorized repairer your warranty will be voided.
I am now left with a $500 ordament, it is a pretty sad state of affairs when a manufacturer of a product doesn't repair its products or have a authorized repairer who can fix them. $500 dollars is a lot of money for the average joe
Please just be aware of this when you think you want to buy a TomTom.