Pros:

Custom melee weapons
Custom pickups
Custom tank
Custom models
Custom music
Custom textures (There's a lot of custom here :P)
Shop/Currency in level 1
Nice level design
Console commands to let others know of completed objectives.
Backtracing through previous levels
Right length for a campaign
Boss battles
Small custom enemies
Nice cutscenes
Easter eggs
THAT LAVA RIPPLE IN LEVEL (5?) WAS TOO FREAKIN COOL

Cons:

Bots has some trouble on ladders and killed themselves (Mainly on the first level)
The camo skins for some guns? I wasn't really a fan of them
I'm still not sure if it was intentional or not, but some tanks spawned trapped unless you pressed the switch, making them too easy to kill.
A couple of missing textures and models - In the boss key chest, and a missing model just before the flame dancer.
The final boss seems a tad too easy, I didn't take much damage from it at all.
I did get confused in some places, while others used the game instructor to show me where to go, which was useful.

Conclusion:

Overall one of the best custom campaigns I've played in a while. Great for any Zelda fan (I haven't played any unfortunately D: ). Would most definitely recommend! Remeber to disable other addons, as that enabled me to see the particle effects which are very important to the campaign.