Chineese Factory Fit Multi-media Navigation Gps Receiver - Are they sound good?

Hi,

I am planining to buy a Multi-media Navigation Gps Receiver (double din) for my Renault Megane.
I was looking for a Kenwood or Pioneer Unit. But, last week I saw a Chineese made Factory Fit Multi-media Navigation Gps Receiver for my Car.

The Factory Fit unit has a great advantage over the Japaneese made, as they fit perfectly with my car, includind steering wheel controls etc..., but i am afraid about sound quality.

I would like to know if the Sound Quality of these Chineese Made Units are good.

The price are the same for the Japs and Chineese units, around USD$700.

Don't get me wrong, I am a Audio/Music Lover, and I care a lot about sound quality, but the Compatible issue is a very important factor.

Any help will be wellcome.

Thanks

Antonio