Still a great place to solo 20-28 or with a group <20-24. The large room straight across the round room from the entrance is excellent if you have spirit damage (SM PBAOE). Once you get up to 25-27 as a supp SM you can chain pull this room.
This room also has a really cool spawn system. There is a named mob, Draugr Commander, kill him and the princess will spawn. When you kill the princess the Draugr Commander and 6 Draugr Warriors will spawn (non-agro'd). So if you're chain clearing the room, kill the Commander, all of the Warriors, and the skel/cursed souls, then kill the Princess, and start the loop over again.
One thing to watch out for though is the roaming corpses. When they die they spawn 1-3 corpse crawlers that are usually a level higher then the original mob.