1. no optical out (not a big issue but an annoyance) 2. the cpu was not the one described in the description. 3. could not decode 4k. (even connected to my gige network) it stuttered and stopped.
The second issue was a major issue. The description mentioned a RockChip 3318 (which is not the best isn't a bad chip.) The device came with a RockChip 3018, which is a low power, low feature version of the RockChip chips. It's slow, and doesn't perform.
There are much better devices out there. I'd recommend the Wetek Hub, which while considerably cheaper, has been able to decode everything I've thrown at it.
Also it's able to do bitstream audio out. Which with Kodi means 7.1 Dolby-TrueHD with Atmos, DTS-HD, and a number of other audio formats.