Played it through once with 2 friends and no problems.
However, now having gone through it on open server with approx 10 players it went well until we were approaching the last target.
Then someone else joined in and we all were teleported to the scud site and blasted away.. one of us misfired his AT in all confusion resulting in bright white flash and Elvis..
Anyways, we had great fun but some odd JIP thing is glitching..maybe?
(Of course it could have also been some hacker crap)