Level design is good and consistent but traps are repetitive and predictable. Some of the traps don't work at all, which prevents getting 100% kills on some maps. Also, MAP30... let's just say that it started to lag A LOT towards the end but it could have been due to the mod I was playing with. Overall, I think this is a 4/5 - definitely worth checking out.
Almost all the maps here are of very high quality in terms of both design and gameplay. MAP11 and MAP24 stand out - they are... weird (not bad, just different). MAP29 has an original concept behind it - I've never seen anything like that before in a WAD. However, its implementation could have been better - this map is quite difficult to navigate and you can get lost easily (same applies to MAP26). I also didn't like repetitive firefights in MAP28. Overall, I think this deserves a 4/5.