I am using a terramaster d6-320 connected with usb-c.
It has been running zfs disks for proxmox via a geekom a5 mini pc since February. It has lost contact with the drives twice so far, more than a month between each time so I don’t know the cause. I am mostly happy with the setup, but of course it is annoying when it fails
I have used them since januar 2019, and I don’t have any complaints. I have only needed to restore backups once - it worked as well as could be expected.
Any issues with backups have always been on my side