I have received a beta key in this Thursday and started to play. Game is very interesting, but have one major con: settings don't save, so i can't set up advanced graphics settings like HDR or bloom, because they will aply after game restart, but every time settings are sets again to the defaults! I tried to edit config file, but it's not helped. I asked to support, they said me that they will fix it up later.
But you can set up the resolution (playing 1024x768 on 1920x1080 FullHD monitor is crappy), though
Also, there is a tip:
When you click on "Settings" button, game blink one time and all buttons go into the top left corner. Type /reloadui into the chat window and you can access the settings