I have a couple of Teclast x98 pros and a hi10. I don’t have any problems with the Teclast tablets but do have a few niggles with the hi10.
1. The screen goes funky sometimes with lines over it. I have to switch off and on.
2. It plain does not boot into windows and fails with a boot grub error forcing me to switch it off and on again.
Overall I would say the Teclast is more stable. I still prefer the hi10 because I like the form factor and it’s 1080p screen. Go figure.