Not a lot to like here. A handful of OK maps buried in a sea of absolute dreck. The last third of the wad was particularly awful - just skipped through that in unfounded optimism there would be at least one map that was interesting/playable. A last resort mapset when you have nothing else to play.
This needs a warning label - it has one of the most annoying "enhancements" ever to stain Doom. A countdown timer. I just abandoned the level when I noticed it. Also first hall you enter has a dozen Hell Knights and god knows how many Imps, while you have a single shotgun and a dozen shells. This kind of crap makes me want to punch my screen. So you've been warned.
I always felt like the vanilla Doom II experience was lacking a certain little something. Stick it in your GZDoom's "skins" directory, you will never regret it. True magnificence is something which chases you around.