I see a lot of people has given a very low rating for this unit, I cant talk bad about it! I live where the roads are really damaged and the ASM-II works like a charm. The resume feature is great. Of course there are some bad units out there, like as in any other electronic gadget, you cant expect that all X-amount of units will be flawless. GET REAL! However, as in performance this unit has behaved excellent, from driving in a dust and dirt road with bumps on a 4x4 at 125 kph, with no skipping, playing Marillion with no skipping, from shorts in the car's electrical system (once)And it kept working ! I'll recommended to anyone !