Pros:

Long.
nice challenge level.
go in depth with info on the infection on the school level.
fun.
good interesting finale.

Cons:

bad weapon placement on some levels like level 3 were there are no guns for the whole level.
a few error sighs might be because i was playing on l4d2.
hard finale.

Conclusion:

A good long campaign but can lost easy at some points. Great in depth info on infection in the school. Quite a bit of detail and like how it is full of army vans.  Challenging at times but not to bad. get this if you want a good long campaign.