Pros:

Well placed items
Well placed MOBs
Good flow and logic of maps
Short and sweet, quick to play
Finale is fun

Cons:

I would like to see a little more of a finale, too easy even on harder levels

Conclusion:

I could play this over and over again. Lots of fun. Flows well. Nice design and layout of the map. I've never been inside a dam before but I bet it can be really confusing just like this map (you can get lost in the maze of tunnels and hallways). The finale was fun, but it slightly too easy even on the more difficult levels. Over all though I really think a lot of thought went in to this design.

Pros:

Nice layout and conversion
Well placed items (see Cons)
Well placed MOBs
Well laid out maps with good logic and flow
Finale is a favorite and well done

Cons:

Less Ammo
Can't think of any others worth mentioning

Conclusion:

Over all this is a campaign I can play over and over. It isn't a perfect port from Half-Life, but I didn't expect it to be Half-Life. I like the logic and flow of the maps, the placement of items (although it could have used a little less ammo in certain places). I love the finale and even though it can be completed easily on Expert or Advance, I still think the map is fun. I'd give it a higher score but I don't think it is perfect so it gives the designer room for improvement.