Pros:

+ Nice layout idea and structure

Cons:

- Missing textures in many areas: ground, walls, doors
- Bots get stucked and can't reach pills or medkits too
- No melee along the entire campaing, not even a magnum
- Infected spawning in the middle of nowhere
- Lack of good weapons and too much medkits

Conclusion:

Nice visuals but, at least for me, playing with pistols... without melee (nor even a tonfa) and that shit of missing textures... were enough. 

Pros:

– A HL2 map/campaign;
– HL2 tex pack;
– Puzzles;
– An inspiration to more hl2 maps =D

Cons:

– Too much water + 7 maps = boring;
– Water + only melee or pistols (most of the time) + 4h campaign = frustrating;

Conclusion:

This is not fun. Not even close. There are very good places and ideas, as in HL2, but not well planned. Facing a tank with 10 shells in you tier 1 shotgun.... is frustrating. Walk long distances through sh...water and zombies... is boring.
If you like HL2 campaigns for L4D2, as me, try this one. But have in mind that you will spend 3 to 4h on this... high level of stress and lack ammo. And if you plan playing with bots, they can get stuck unable to help you in many places.

Pros:

+Very good textures;
+No sound glitches;
+Custom sounds (I didn't verify fire/explosive bullets... but, who cares!?)
+I really don't care about animations, since it works fine.

Cons:

-None, at all.

Conclusion:

Old weapons are powerful, fantastic, amazing! And this one is perfect. You should do more of them, buddy! Maybe for the Military Rifle next.