Whispering Cairn: Acid beetle swarm and the wind warriors were very difficult. Wind Warriors had two PC's unconscious.
Three Faces of Evil: One PC was unconscious in the temple of hextor, the barbarian grimlock in the tunnel totally annihilated the same PC and I gave the kid a DM pass. The labyrinth was by far the most challenging it took them 40 rounds and frustrated them for almost 4hrs. My faceless one also hammered them dropping the rogue after rolling a 1 and a 2 on back to back Reflex saves vs his lightning bolts lol.
Blackwall Keep: With only the kyuss encounters left this has been a walk over, which is good since the previous two have been difficult and HoHR is going to be a hammer. It's good to give them a chance to flex their muscles and get over confident :)