Installed it today and I am writing this post on this device
I am ready to test things as well, but I am not as tech-savvy as others on this forum, so maybe I would need some instructions or so.
@elessar-0 yeah, also had this first time. All I did was switching from "stable" to "develop" (or daily?) in Ubports-installer
Also I used the 0.7.4 version of the installer, 0.8.x did not work.
If it stuck on boot-screen, you have to enter bootloader (turn off > vol- + power > android options > advanced > reboot to bootloader). That way your pc should recognise it as oneplus again and you can reinstall the system.
And yeah, lot of things do not work.
Tested this with Oneplus2
When in bootloader, device is not recognized, error: "The device msm8994 is not supported"
In release 0.7.4, same situation, device is properly recognized as oneplus2.