Pros:

Kakariko village over run with zombies
Boulders no longer insta kill you
Perfect boss right down to every detail
Mini bosses are perfect down to the flames changing colour when they take enough damage.
Gorons as Tanks
The puzzles are almost exactly the same.
The fire maze is perfect
The fake doors are even animated perfectly
Wind Waker Link gnome
Megaton hammer affecting the boss, pillars, and pressure plates the way it should.
KEESE WHY? (A pro because it's accurate)
All the maps are connected so it's more like the real Death MOuntain.

Cons:

The fire maze is over powered, it only does a quarter of a heart of damage in OoT, why does it drain my health down to 40 from 90 after half a second?
Almost impossible on single player mode

Conclusion:

This is by far the hardest map I have ever played, zombies EVERYWHERE. But it is also the best map, up there with Kokiri Forest, everything looks amazing, you even had to kill the boss using the megaton hammer, the boss was animated the same way she was in OoT. I still have HOLY **** THIS IS BLOODY AMAZING going through my head several hours after playing it, at some point, I'm going to (attempt) to go through the map using only the Biggeron Sword, just because I'm a geek. Nothing was glitched, never had any problems with the Goron tanks, (Minus a small amount of jiggle bones, but I can deal with that), and I had so much fun playing through this map, screaming and cussing at it like I would at OoT. Almost a true Zelda experience. I even liked the Keese, who are my mortal enemies in most Zelda games. Bloody ice keese. The fake doors were AWESOME, even though they murdered me twice.