I don't have MINIX U9-H and I can't really comment on this device after LibreELEC flush.
I do have Zidoo X9S and I can defend this device a bit.
It has few good features and some of them are probably matched by LibreELEC system.
- Ability to run as NAS server with multiple drives even SATA connector for desktop drive. I have 8TB on USB 3.0 port. No issues with the drive, sleep mode works fine, good transfer rates reaching 70Mbps over Gigabit LAN.
- It could work as tor client with vpn right on the device
- Has build in BD menu player
- Plays 3D MVC, 4K HDR and Blu-Rays from file structure and ISO. BD Menu supports automatic forced subtitles and other special features and extra tracks
- Home Theater poster and art app. This is simplified graphical data base of your collection. BD menu can be lunched directly from the poster wall.
- It has own version of Kodi based on 17.6 with build in external player lunching Zidoo hardware player. It accepts skins and it can be customized to you liking. Kodi native player is skipping frames and has lower quality video output compared to Zidoo player.
There are probably some other benefits from Zidoo like ready to use out of the box device etc.
The bad:
- Micro stutter doubled frame started afer firmware 1.5 based on forum info.
- Strong stutter lasting about a second and repeating every 4.5 min started after firmware 2.0.15. This second issue applies only to movies with higher compression ratio mainly Web-Dl that show problems with frame rate in TSMuxer.