Pros:

+ Creative level design
+ Lots of ammo and pills
+ Nicely decorated maps
+ Plenty of oxygen tanks, propane tanks, and gas cans

Cons:

- Not enough throwables
- Strange spawn points for infected
- Short maps
- Way too many tier 2 weapons scattered throughout maps
- Finale needs work; see conclusion
- Perhaps too many pills
- Not much to explore

Conclusion:

Thanks for making a map for L4D1, there truly aren't enough. Maybe work on making longer levels and this campaign would be great. I was playing on single player and Bill got stuck at one of the ammo piles on Map 4. The finale was very easy. Also, when the rescue train arrived, I had to run after it. Then it said all 4 of us survived even though we weren't on train. When the credits starting rolling, the game was still playing. I could hear everyone still shooting and more infected spawning. Needs work.

Pros:

+ Great level design, not too long, not too short
+ Plentiful and numerous pills and throwables
+ Truck rescue in finale was great
+ Lots to explore
+ Enjoyed the alarm triggered weapons cache
+ Bot nav was decent
+ Thoughtful level design: going up ladders that might otherwise be ignored to find goodies

Cons:

- So many throwables and pills, most went unused since I played by myself
- Bots didn't want to get on truck in finale
- No survivor dialogue

Conclusion:

Great campaign for first time mapper. Works well on single player and would definitely recommend to others!