Started playing last night as my gf was playing Shadow Fall. Got kicked from the first server I was in due to connection problems (never happened before) but then I entered a new server and played 3 games with no problems.
The first server had 8 players, the second one dropped after the first game and I was alone for a while in one of the games, but thought I would wait it out, seeing as I was the host (guaranteed good connection) and it was the vanguard part of warzone!
Still a great game, but it is so hard to get used to the controls again after playing PS4. I thought the controls were great, but KZ: SF was a step up!