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.
Bought a MiBox for my basement TV (only really use SlingTV on it to watch college games on the weekend). Purchased from Walmart couple days after it came out. Zero issues with it. I was so pleased I bought a second MiBox for my upstairs living room TV and replaced my i3-4170T HTPC I had in there. Runs SlingTV and Kodi no problem (Kodi playing from my Synology NAS in another room).
That worked so well that I replaced my Atom Stick in the garage with a MiBox and the Atom Stick on my back deck with a MiBox.
No issues with three of them running Kodi at the sametime pulling from my Synology DS916+.
Now waiting to see how the new Directv Now steaming service is and if it allows multiple streams at the same time (need ESPN streaming on multiple TVs).