Pros:

Excellent port so far
Use of L4D2 SI skins
These guys made a better job on the Jukebox than Valve

Cons:

Extras needed to be installed, but that's expected.
Valve for making an half assed job (again and again) and making the community create better maps than themselfs.
We need more maps :P

Conclusion:

Valve should learn a lot from this.