I've had nothing but problems with public games.
In one game my four teammates completely ignored the shields at the beginning of wave 20. The shields that I placed earlier in wave 19. MORONS. We got demolished by blood mounts.
In another game, one guy kept complaining, "stop taking my kills!" He was a good player though, until he died on wave 19. All he did was whine about us leaving him to die -- never mind that we were holed up in a corner defending while he was on the other side of the map being a "loner". MORON.
With 2 other allies in a local private game game, we've only made it to about wave 19.
-The Le