I tested the ROM at the link provided above and I must say there is one good thing about it - the flashlight when pressing the home button on the lock screen is working.
But the what is the Android version shown in the settings?
If is 8.0.0 you can download and see works apps like substratum or apps reserved at Android O?
Oh and it is rooted?
It's 8.0.0 and it's definitely Anroid O, but not all things work well, because it's probably a leaked development version, not the final one. I found some apps not working (Google Play Store says they are incompatible). I also tried sideloadling the apk's, but they don't install, so they look truly incompatible. Something BV will have to address before releasing it.
It's not rooted, as it happens with all Blackview official rom's.I'd only suggest using if you don't mind testing software, but it doesn't enter deep sleep, so battery usage is very high, some apps don't work, and it's not 100% stable yet (I guess that's why BV have not oficially released it yet). I'm using it everyday, but I'm used to testing software on pc's and smartphones.BTW, the camera quality has improved significantly, as it takes photos with way less noise than before, and the hdr mode now makes a real difference, although the camera app is still a bit unstable.