i had both Dynavin's
first didn't even work then i got sent the E99 and it was better but was slow
the guy who installed my kenwood called it a dinosaur
i mainly bought it to run an external harddrive with movies and songs.. it wouldn't read any external hard drives
tried a couple usb drives and got 1 of 5 to play, gps was crap also but i'm in canada so it might be a bit better for you