Played on Friday and Saturday night and had two completely different experiences.
Friday night was littered with bugs, being kicked out of missions, connections going down, issues with squad set-up.
Saturday night was smooth as you want, plus by this stage I felt a lot more comfortable with the controls: flying, abilities, dodging, hovering, ground combat, supers etc. I felt a bit more in tune with the game too whereas initially I was struggling to see/identify enemies. We completed the stronghold (only on easy mode - we deffo could have taken it on normal) and I thorougly enjoyed it. With a decent squad of players who've gamed together before we'd soon started getting our combos together.
I'll definitely be getting it as even if it's just something that lasts a few months it'll be value for money. Hopefully this free demo and the earlier VIP one will have given them some crucial information to manager their servers (like I really know what I'm talking about). With fresh content and continued support they could be on to a winner here.