thanks for the mention @Donkey Grundle
, I don't check here much anymore.
To answer your questions @Habaku
, the quality has held up surprisingly well. Like most anyone else that bought these, I was worried about overall build quality, reliability, etc., and for the most part I haven't had any issues. Like donkey mentioned, apps will force close or lock up occasionally, particularly waze for me. But it does not happen frequently enough for me to be bothered by it. I will say to avoid using the microsd slots, as it caused significant issues with the unit when I tried using my own. That was the biggest issue I encountered. The unit comes stock with one that works fine, so if you need to update maps, or do an update (like install the iq navi firmware), just copy files to the stock card.
I live in Houston which is extremely hot, and it made it through the entire summer without a single heat-related issue. Only thing that has happened other than the minor android app instability is the plastic silver ring surrounding the volume knob fell off. The other issue I have mentioned quite extensively is that it's not an audiophile quality unit. Sound is largely flat and lifeless (compared to a true audiophile grade source), but it will still sound better than stock due to the more powerful internal amp. If you want to do a custom audio system, you will need to add in an external DSP to your signal chain.
So outside what I have mentioned, I have nothing negative to report. It has held up surprisingly well, and I don't regret my decision one bit. I will say that I may consider getting an octacore 2GB unit once those become more common, as I find that we're pushing the hardware to its limits simply by running waze & poweramp simultaneously. Waze in particular seems to stress the unit quite a bit. It's tolerable, but I would prefer something snappier. Still, you can buy the unit with confidence.