Just wanna kill monsters? Don't want a long, boring story to interfere with your murder spree? This is your game!
Procedural levels, turn based everything and a carpload of loot, that's my idea of a great dungeon crawler!
Also, after you clear each floor, you are given the option to go back to town or continue upwards. If you choose next level, you're stuck there until you find the stairs or your party wipes, whatever happens first. This adds fun as you can choose to push your luck until you're desperately searching for the stairs with a couple downed characters!
tl; dr: Its simple and fun, and the devs deserve your $$