The dungeons are large and make for a fun pastime when you want to go exploring. They may generate any number of trees and resources, mostly spheres of lava and trees/plants. I can see people repurposing dungeons as bases once they've sorted out their loot.
A small downside is that the dungeons seem to take about 1-3 minutes to generate. While this is going on, the mod stops the rest of the game's processes like chunk loading. The first few times I tried this mod, I believed it to be broken when I encountered chunks not loading or failing to find any dungeons. When in reality, they just take a long while to generate. I would like to see some workaround where segments are generated a few steps at a time, to allow you to play and not have to wait around for any given dungeon to load all at once.