I would say this unit is a big improvement on ALMOST everything over the z3 I had previously. Voices are nice, navigation is great, ipod interface is worlds above anything else out there (especially the DNX9140 i almost pulled the trigger on...loved the dual USB ports) and the boot up time on ths z110bt is super fast. I miss vehicle dynamics the most, even the simple ones found on garmin gps systems (like current speed, fastest speed attained, elevation, etc). Oh, and I wish I could play Divx files from the USB / SD cards.