Reddit mentions of Joying Head Unit

I installed this one on my car: https://www.amazon.com/gp/product/B01I6LP464/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1.

I haven't tried OBDII on it, but I'm pretty sure they support it. Reverse camera works well, and works even before the unit finishes booting. Below is the summary of my experience.

Performance:

The unit performs pretty well and has decent a decent DAC/amplifier. I believe they have a 24bit DAC in it, and I haven't run into issues with the amplifier. It boots in the typical 25-30s, which seems like a while (and it is), but it's usually done booting by the time my garage door finishes closing. The unit may have some lag or touch issues once it first boots up, but in general it's pretty snappy.

For maps, I used Sygic, and it works well for offline maps and navigation. I tried other solutions before by Sygics was the best solution I found. Google maps is too limited in what you can download, and some apps just flat out don't work in landscape. Sygic let's me download anything I want, and the interface is pretty good.

Installation:

The install was pretty easy, and it turned out okay, but it wasn't perfect by any means.

This unit does NOT require an adapter as it is already 10mm wider than the standard double DIN (just like the OEM unit). Most wires were plug and play, but I had to splice wires for the remote amp turn on and reverse camera signals. You will also need an adapter for the antenna.

The final finish is pretty good, but the unit is shallower than the OEM unit. As a consequence, the back side of the silver trim was pushing on the head unit; you can't push the trim all the way in, and the head unit's trim won't be flush with the glove compartment's trim. The solution, which may seem scary, is to sand down the part of the trim that you can't see. Once the trim is no longer pushing on the head unit, everything will install flush, and no one will be the wiser.