I own this unit, but did not purchase it from Sonic.

The XNV-770bt is a great first try and double din nav for sony. However, it has its short comings. I for one, find the display quality to be top notch. Movies looks great and you can see all the little details on your album art. The layout is easy to maneuver around; even while driving. Its a little bland looking, but I think its a good thing. I checkout kenwoods line up and there is no way I could navigate that while driving. It looks pretty but its only practical if your sitting still.

It has many great features for the price. Not alot of sound tweaking features. Only high pass crossover for speakers and low pas for subs. No active tuning but it does have a 7 band EQ and T/A which is great. Also, I like its radio/CD interface. But I dont like the RDS info, or lack there of. It only shows like 10 lines of text at a time. A big chunk of the screen isnt utilized.

There are major issues with the TomTom nav. It is a known issue that after awhile, these units will lose satellite signal and rarely be able to get it back. Mine worked for 3 months before I lost signal and I didnt get it back for two weeks. I had no luck resetting the unit to fix it. Only connecting it to my computer and using up and update fixed it. For now...... knock on wood.

I also had to RMA my first one because the tomtom voice didnt work. Wasn't a settings issue, it just didnt work. No sound.

Overall, I think it was a good attempt. I like this unit alot. I just wish the radio RDS showed more than a few lines of text and that tomtom would get their act together and fix their gps.