Alright guys, here's a first round of comments after having tried it in the last 5 hours.
1. Flashing TWRP
I had problem flashing latest codex's twrp: twrp-3.3.1-20190908-0-codeworkx-signed-forcedecrypt-dumpling.img
It gave me seg fault, so I tried codex's twrp-3.3.1-1-20190713-codeworkx-dumpling.img
2. Setting up
I managed to succesfully flash LineageOS, but I can't seem to get past through the setup process with gapps installed, so I had to go through the setup process without gapps then flash gapps after.
I am a big fan of Magisk, but unfortunately flashing Magisk v19.4 got me stuck in booting. I usually did fingerprint spoofing through magisk module, so thus far, I cannot get my safetynet check passed. Which means no Google Pay, but I don't use it anyway.
Also I usually apply DotFix for GCam through Magisk, so I had to give up my camera too, not too much a drama since I don't take pictures anyway.
Good thing is this unofficial release does have encryption if I set up lock pattern. However, my TWRP can't seems to decrypt it. I treid both twrp-3.3.1-1-20190713-codeworkx-dumpling.img and BluSpark's latest TWRP but to no avail. This means everytime I need to flash something, I'll have to remove my lock.
5. In phone quirks
After setting up my phone for a few hours, I found out a few small issues such as
* Not able to unlock screen with fingerprint
- Suddenly magically working
* Digital Wellbeing not working and sometimes pop up saying that it crashes (possibly from beta gapps)
* Circle battery not working
* Battery percentage not showing
* I can't change accent colour, it defaults to the grey-ish colour
6. The awesomeness
These are the things I have found thus far working for me:
* The new gesture! Wohoo!
* Double tap to wake! God bless that feature!
* Full Dark theme! Finally!
* Alert slider!
* Long press power for torch! Yay!
* Network speed indicator!
How rude of me for not showing appreciation to codeworkx's work!
A big thank you to codeworkx for all his hardwork and effor for the community! You are much loved by everyone here man! May this year and every future years always be a blast for you!
My fingerprint unlock suddenly magically worked!