Cool features I love:
Its super fast. Most of my maps take 10 minutes or less to make
"AI" that can randomly fill rooms by type.
Paint brush function to scatter random terrain features
Place a 3D "mini" and record the dungeon in 1st person view. I use this to show intros videos to my maps
Really cool lighting effects so you can have glowing purple torches against a green lit sky.
Temple of Talona in the Underdark:

Battling in an infected wasteland in Gehenna

The blood road that they fought a mad max style battle on a series of Infernal warmachines in Hell.

The townhall in their friendly local city

The muddy caldera lair of a legendary Otyugh Bard named Mudcaller that sang Otyugh themed limericks through out the fight!
