I've been doing some of the survival maps. 24 must be my magic number, I think I died on that round on 4 of the 7 I've tried so far (the first 7 on the map list).
I had a weird moment earlier- a dog jumped me and I panicked, so it killed me. I was like ' crap I died', but then I was suddenly back alive. I'd forgotten I bought a self revive :P.
And Tranzit sounds interesting- sounds like I'll be able to lead zombies around in a circle easily.