Just FYI, I bought a JXD S192 from geekbuying nearly 7 months ago.
It has now completely died (yellow light).
Geekbuying has a 1 year warranty on this device...apparently...but instead of offering to replace or repair the device, they've offered me $30 compensation!
My conversation with them is ongoing, but I'll update this thread throughout the process.
I think it's important that people understand the level of after-sales service they can expect before they buy.