I like them a lot. I use them to level my roles in addition to some roulettes. They are perfect for me especailly with roles I don't use that much and they allow me to take my time and to learn how to play them better before venturing out into df with others. I've leveled them on one of my alts and am leveling them now on my main.

And yes they do give Tomestones when run at level 80 with level 80 dungeons.