I'm really not sure how to rate this one, as my feelings on it vary pretty wildly. The WAD is kinda segmented into chapters, and I feel pretty differently about each.

The first chunk of levels are decent. You can blow through them pretty quickly and they don't abuse the enemies, but there's also not a whole lot interesting about them.

The middle chunk is really good. There's a few fantastic levels in there that know just how many enemies to throw at you to create tough but fair, dynamic levels.

The last section was pretty horrendous in my opinion. The levels get really hard and, occasionally, experimental. There's a level where you have to basically speedrun through it in less than 30 seconds, or you die. There is absolutely nothing fun about it, and I eventually had to noclip because I was so sick of it. These levels also gave me my first taste of a slaughter map, and I must say that it is absolutely not for me. Standing there spamming the BFG for 20 minutes taking out 30 Cyberdemons isn't fun. It's not even really all that challenging, it's just mind numbing. The last level is also a slaughter map of sorts, and one that I had to god mode through. At that point I was sick of everything and just wanted it to end.