I ordered two boxes. First one is a complete dud, LEDs turn on but it does not output video on the HDMI port.
Second one has the Netflix problem described here: https://www.reddit.com/r/Xiaomi/comments/576lsw/anyone_having_problems_with_netflix_on_the_mi_box/
YouTube at 60fps always stutters.
It also has a bonus problem of certain screen resolutions are unreliable. Sometimes 4k 60hz will produce a lot of visual and audible cracking. Other resolutions (1080p 50hz) appear okay, but after reboot will have heavy distortion, lots of lines and nothing else. At this point I have to YouTube a mi box review video on my phone to determine the correct button pattern to change the resolution to something else.
I did notice that my serial numbers are sequential, maybe it was a bad run.
All in all, I'm going to return both boxes and hope for a nexus type player in the future. If I had none of these problems I'm sure I'd be delighted with the system. I wish I didn't waste uncountable hours troubleshooting, applying updates, factory reset, tech support from Xiaomi/Netflix. Back to chromecast for me.
I have sideloaded Amazon Instant video using the APK from apkmirror (http://www.apkmirror.com/apk/amazon-mobile-llc/amazon-instant-video-for-android-tv/) and ES File Explorer.
So far, I seem to be able to login, browse, play trailers, but when I try to actually play TV Shows or Movies, I get a playback error. Has anyone been able to get this to work?