Excelsior
I was about to pull the trigger on that unit and decided against it after getting to play with it.
Sony's are normally pretty good, and TomTom's have great GPS.
I was disappointed with the interface and controls. It seemed laggy and you had to navigate through multiple levels to get to things that I feel should be at most, one menu sublevel away.
As much as I dislike the garmin in my Kenwood, I think the Audio/Multimedia is much smoother and better laid out than this model sony.
As such, I decided to just keep my Kenwood and use my iPhone for GPS when needed.
I hope that helps you somewhat.