Last weekend I powered on mine (from soft standby) to find a flickering gray screen. I rebooted it and got stuck at the boot screen. I wiped the userdata and when I rebooted again, it was running 2.0.72 -- I had previously upgraded it all the way to 2.0.77! I downloaded and installed 2.0.78 and it seemed to be working for a while, but today I got into the familiar endless loop of "Unfortunately, Spark Home has stopped" popups. Exiting them via either the Wait or Quit options only led to every channel I tried to view cycling between working, "Scrambled", and "No Signal". After rebooting several times, it stabilized, only to later lock up hard on a blind scan...
The final weirdness I ran into today: after wiping userdata last weekend, I had no extra apps installed. I left it that way (from lack of time to play more than anything), so I'm now doubting the hypothesis that adding apps like Kodi causes instability! But when I did download and install the latest version of Kodi, I was expecting it to also be a blank slate. When I started it up, it did in fact print the expected "preparing for first run" (or however it phrases it) message. But after it started, all my network shares were exactly as I had left them! (Unfortunate, because I was really hoping for a clean slate -- it's made some bad guesses as to titles and artwork from some of my filenames, and I'm too lazy to figure out how to fix it...)
"Alien" is certainly an appropriate name for this receiver, because it defies human logic at every move!