A vast improvement over the original.

Pros -
+ Better graphics
+ More Maps
+ More gamemodes
+ Improved gamemodes
+ Super fun with friends
+ Replay Value
+ Probably most, if not all, your friends have the game (I have 40 friends with the game)
+ Workshop, mods, and active community (Not that active, but active)
+ So much to do, So much to see

Cons -
- Worse community
- Need to have friends to play with to have the full experience
- No Shrek, you need to download a mod for it
- Doesn't have the same feel and atmosphere of the original first Left 4 Dead

A vast improvement over the original. Pros - + Better graphics + More Maps + More gamemodes + Improved gamemodes + Super fun with friends + Replay Value + Probably most, if not all, your friends have the game (I have 40 friends with the game) + Workshop, mods, and active community (Not that active, but active) + So much to do, So much to see Cons - - Worse community - Need to have friends to play with to have the full experience - No Shrek, you need to download a mod for it - Doesn't have the same feel and atmosphere of the original first Left 4 Dead