Honestly a perfect afternoons worth of doom. It's a really solid nine level set that shows what 15+ years worth of experience with level design can achieve, while also being approachable enough for people who have just played doom 1, 2 & 64 to appreciate.

Also if you can I HIGHLY recomend playing through this with the original soundtrack by Peter Laurence and various artists as adds so much to each level.
https://www.doomworld.com/forum/topic/119301-no-rest-for-the-living-community-midi-pack-released/