I used it a year ago and it still sucked. From an stability standpoint it was fine, except it had plenty of terrible ui decisions. Take driving in manhattan for example. A driver would like to glance at the directions and see turns and the directions the road is turning. However, this is not possible. 3d renderings of the new york skyline block the roads on the map so you cannot see in the app any further than you can outside your front window.