I had to replace the mount. It lost it's stickiness/air tightness and would fall off after a few days. I bought a new suction mount and no issues there. The battery doesn't hold much charge, and it draws a surprising amount of power if you leave it plugged in to a battery source. I leave it plugged in to a keyed source and don't really care how long the 'sentry mode' lasts, I just want it for driving.
Other than those minor issues, no concerns or problems.