After installing the unit, I started having problems with the map function. After a while the sd card completely died on me. I had no access to gps or Utilities apps. This happened after 3 days of installation. I tried contacting the manufacturer and that led to nothing. I had to return the whole thing to Sonic Electronix. After receiving my replacement, the unit I received had a grounding problem which I fixed on my own. After working around these little problems I have to say the unit is great and offers a lot of awesome features and transforms your car entirely. Maybe I got faulty units or maybe their build quality isn't really the best. I say buy it, but be warned there might be some problems.