I just ran through this on Gilders on Lammania and this new pack has a really neat storyline. I took it slowly to learn all parts and found lots of secret doors, with hidden chests. It's level 15 throughout really, so Gilders was able to solo it on normal, although the undead beholder was nasty and I had to run out of the room 2/3 times and drink pots to make sure I didn't die.
I picked up a couple of items too:
Insanity - a pretty sweet looking greatsword which has the chance of giving enemies -2 to AC, -2 to dex and -1 to wis, as well as send them into a wild frenzy and make them attack their own allies!
Beholder plate armour - Antimagic spike (can stop enemies from casting for a while), telekenisis guard (can cause enemies to fall to the ground) Trace of madness (it can be upgraded), however, it can cause you to be exhausted when damaged!