Pros:

-Faithful to the LoZ game within reason
-Monsters from zelda have been added

Cons:

-No way to tell how much damage the boss has take.
-The 'zelda' monsters where made in hammer
-'Only' the first 2 dungeons

Conclusion:

A good conversion of an old classic. It would be nice to see the rest of the dungeons added. I would like to see the monsters from zelda made as custom models rather then from map geometry, this will allow for more detail where appropriate. Due to the way the bosses work I doubt it would be any better if converted to l4d2 as the boss is best fought at range, so keep it as l4d1.