I had one in my car and decided it was too buggy, even for me. It was last January when I took it out. I still have it and would like to get rid of it. I can answer questions about it, but I don't know if things have improved over the past year.

EDIT: To simply say it was buggy isn't very fair. It's more of a usability and sound quality issue. The lack of volume knob is annoying. Any music app that you sideload (Pandora, Stitcher, etc.) doesn't seem to go through the EQ and universally sounds like crap. The GPS dongle will fail on you eventually. You can't control volume when using Waze (even though Waze was a supported app). The UNIKA steering wheel control box is a total pain in the ass.