Played some last night, actually quite fun. It's faster paced than PUBG, very CoD or Titanfall-like in terms of gunplay, which I think caters to my play style a bit better.
Squads of three only, as far as I'm aware.
Solo play is viable, because the in-game voice chat is half decent, as well as the marking system (press F to place a hostile spot marker, for example).
Vertical movement is fun (sliding down inclines, and using ziplines). Makes the game feel actually three dimensional, and makes you feel free.
No insta-building cover (apart from the bubble shield ability on one of the classes), which is the reason I don't go near Fortnite.
The keybindings don't take much getting used to.
Games feel quicker, and lobbies aren't buggy. Queue times for a new match are fast (at the moment at least). When the round is over, it takes about a minute to get back into another game.
Solid game in my opinion. Definitely worth playing a few rounds to see if you like it, considering it's free.