After dropping my previous phone on the street, wrecking it, i got myself a nice shiny second hand OP6 to have a UBPorts phone. Whilst searching for possible devices, i noticed a lack of reports on the forum on how well the port is - so here goes my review for the OP6.
TL:DR;
You can daily drive it if you have to. Notable problems are lack of sleep mode (so you're going to have to charge it overnight), and that the camera crashes immediately (which i can live with).
Mobile data, both sims, bluetooth, wifi etc all work.
How to get it
Please check here: https://github.com/ubports-oneplus6/documentation
There's a discord group referenced, joining there will allow you to ask questions about OP6 and OP6T.
Longer review
First off, the OP6 is a nice piece of hardware. Fast chip, good screen, decent battery, and a headphone jack. It plays out well running ubports - it's very smooth (much better then my old BQ), and even without sleep functional it'll last you the day easily.
Stability wise, it's pretty OK. So far i've seen one spontaneous reboot per day. Keeping many apps open is no issue at all (including a 10-tab morph). Some apps (Futify for instance) do disappear - but i assume that's because of Futify. Also, very important, I haven't missed any calls yet.
Looking for the future, with the GSI not getting updates anymore, I'm looking forward to getting a "real" OTA-able phone setup. I'll post some more when I have been able to drive it.