I played a couple of matches of the beta and for some reason just didn't care for it. Decided I wasn't even going to take a second look.
Fast forward to yesterday and I see all these great impressions, so I decided to pay the $5 to get the 10-hour trial and I'll be damned if this game isn't amazing. I've only played Operations and it has been a lot of fun. Both times I was defending and it's been fairly easy so far, even with the attackers getting three attempts. The attacking team will have to be very coordinated to pull off a win I believe, or the defending team would have to be very inept.
Game runs great for my tastes and looks insanely pretty. Running at 4K on a 6700k@4.4Ghz/1070 slightly overclocked/16GB PC3200, DX12 in-game and all settings on auto (which seems to put everything at ultra). Seems to hover around 50fps from my best guess, I haven't paid much attention because it's been pretty smooth for me.
The sound is fantastic, so much going on and the fidelity of it all sounds great.
Overall, the action is just crazy in Operations since the fights are heavily concentrated at all times. There's never a boring minute.