Right, so just gave this map a try and I have to say it's a fair bit of fun. I am familiar with Cryogenic so it didn't take long for me to adapt. Very similar gameplay. Not sure why so many people are having trouble playing it. I experienced no crashes or even any frame drop and my PC isn't exactly top-of-the-line.
One thing that really bothers me is the damn jumpscare up at the top of the tower. I know it's half-hearted since it doesn't even make a noise and is clearly meant to be a joke, but I just hate them myself.
However, after all is said and done, there is very little more amusing than hearing the Tourettes Guy scream 'YOU HAVE BALLS!' in the middle of a zombies game XD