It was acting really buggy for me and Muzzleflash, although it might have had something to do with my suckish 300 ping.
One bug i know was not ping related, was we coudln't get the wheelchair guy to do anything when we brought the security guard back, no matter what we did.
So we eventually just grenaded the wheelchair guy and quit
As for gameplay, i didn't think it had anything innovative in the way of combat, but some areas were neat, like pushing the test cart (seen in blue shift on a camera) and moving through parts of the destroyed hazard course. I Also liked how high quality the wheelchair guy model, and the HEV/health charger models were. And then some of the prop models were cool, like the pool ladder. diving board and lifeguard stand.
Also for some insane reason, it was all fullbright for me, I still havent tracked down the reason as to why that would happen.