I'm almost finished with this WAD (about halfway through map 13), and I have to say that I'm...kind of disappointed. It starts of great: Map 1 puts Doom Guy in his home, but it's now infested with Hellish parts, like a sink in the kitchen overflowing with blood, and the bathroom now blocked off by vines. The basement leads down into an underground cave with rock mixed with flesh and blood textures. The music was intense, eerie, and thrilling for this map.
Map 2 puts Doom Guy back in his home, but now it's normal. I found this kind of trippy and wondered if map 1 was a nightmare or something. Now we step out into a quiet city at night, and it's expansive and beautiful, including the very gorgeous park. It was like a cross between "Dawn of Reality" and "Phocas Island 2" (two WADs I really enjoyed). You get the complex, vast city with a variety of architecture (like DoR) but you also get the non-linear, exploration-heavy game play. Monsters are rather sparse, but the process of figuring out what to do distracts from that.
I wondered if the whole WAD would be like that, involving lots of exploration and, possibly, some freaky twists (ala the first map). But, after map 2, things seemed to change far too quickly in a different direction, and none of the maps regained what maps 1 and 2 created. Plus, I have to admit that maps 3-13 were a mixed bag Map 8, "Zone X," seemed too much like a generic tech facility map, and it was my least favorite.
The maps seem to be battling for a solid, coherent theme, as they belong together but also don't. They seem to go off into their own directions, yet, as stand-alone maps, I'm not so sure they'd be successful at all. Also, things dragged on way too slowly after map 2, and I felt kind of bored at times.
The music, though, was consistently excellent (save map 8's, which I found a bit annoying), and I have to say that "Sacrament" at least has a solid, professional-style soundtrack. But I don't think the WAD lives up to the epic quality of the music (sorry).
It's not a bad WAD...I just think that there's too much of a disjointed feeling amongst the maps, and maps 1 and 2 seemed to start a completely different story from what actually ended up being presented.
Sorry :-\ Just wasn't my thing.