OK managed to get a few hours of (mostly) working game.
Its a bit janky in places, for example the bright terquoise waypoint gate things that you can see floating in the sky, I can't turn them off, despite according to the options I have. I don't think ..... I am doing anything wrong.
Also I tried to change the cruising altitude in my flight plan, yet the ATC is forcing me to fly at 2000ft, that may be me doing something wrong though, I dont know.
Not all of the planes work properly either, I stress, I have only tried a couple, but the air ambulance lear jet thing, you cannot retract the landing gear, it just doesnt work, even if you manually try to do it in the cockpit.
Sirrus vision G2 jet is a nice little plane though, did a run from Standstead to Rotterdamn. The controls (autopilot, setnav etc) are all pretty easy to work out from teh cockpit. I have a hotas X but I am mostly using the mouse curser to twiddle the autopilot dials, heading, speed altitude etc, im only using the stick for the manual parts, take off and landing.
I just hope it continues to work tomorrow when no doubt the server loading will be much higher.
EDIT: Ok not being able to remove the blue waypoint gate markers is a confirmed bug, apparently if you also disable the taxi markers it will remove them.