I've tried joining a game 4 different times and was only once able to get in. Each other time I'd repeatedly get 'Failed to connect'.
The one time I was in, it was meh. It was the space map (CTF) and vehicles dominate the game. I'm more of a quake type death matcher.
It was kinda confusing with not knowing what all the buildings were, but being my first time that's to be expected. But since all the buildings are dropped-in all random like by the players the confusion is heightened.
If i could actually join a game my impression may have been different.