My group is very excited about this module. They have been chomping at the bit for a nice meaty dungeon crawl ever since we ran through the Lich Queen's fortress from the Incursion Campaign cross-over event, and I'm anxious to see what Wizards has done with this age-old classic.
I still remember pouring over the original four-level gigantic maps with both awe and trepidation. Trepidation mostly because so much of the maps were left undetailed. The theory was the DM would fill in the blanks with his own material, but given the sheer size of the map and myriad of directions the characters could travel, the party could end up in a vastly different part of the map than what you expected. And, a random teleporter could put the entire group on a entirely different level of the dungeon altogether. So, I find myself wondering about the new format. Since this is a super-adventure/mini-campaign, I imagine it will be quite different from the original. Nonetheless, I'm sure it will satisfy the dungeon -delving cravings my group has been having.