Chris,
This is seriously one of my all time top megawads. The level design is intricate and clever without being obtuse, the flow of each map is fun and engaging and it's never over the top. The texture work is great, the details are not extreme (which I prefer) I really, really enjoyed this mapset and I am only just starting episode 3.
Really, thank you for crafting such an enjoyable WAD. It's an excellent reminder that DOOM megawads can be just as great as DOOM 2 ones.