[ShrimpBurrito]

I have the 507 system -- works great. I don't have anything to compare it to, but I have had nothing but great experiences with it after about 5,000 miles of using it over ~1.5 years. The only criticism I have is that if you use the dash mount, the display unit does not fit snugly into it, so it moves back and forth ever so slightly while traveling. It's not that annoying, but I'm trying to figure out a way to stop it but haven't been motivated enough yet to do it.

Dave