I recently purchased a JVC KW-NT1 Nav deck to replace one of those Chinese all in one units currently on ebay.
Here are my first comments on the device and am interested in starting a thread for anyone else who has one or who is interested in one.

Here is a copy of the review I left on JVC's site.

"This device has almost everything I have been looking for in a multimedia deck for my truck. It has DVD, GPS, iPod, SD, USB, Bluetooth and everything is already built in. I discovered it does support a 4Gb and 8Gb SDHC card although that is not documented.

Here are the few items I don't like or feel that is missing:
- No RDS (radio data system) I fail to understand why they wouldn't have added RDS to a multimedia deck
- No support for WMA or AAC. Ok I can understand the lack of AAC support, but this is a Windows Automotive product and yet it doesn't even support Windows own formats?
- No support for video from the SD or USB slots.

Hopefully a firmware upgrade will be all that is need to address the few shortcomings."