Demon of the Well
I finished this in a couple of afternoons some time ago, not long after this thread was first posted. I generally prefer medium or larger maps, but little bitesized morsels like most of the maps here are make a good change of pace once in a while.
Most of JC's offerings were consistently fun--especially that one in the sewer, and also "RuinTech", where I ended up scoring something like 185% kills off of arch-vile resurrections--and reminded me a lot of Hell Revealed II in a number of ways. Also enjoyed the tough mid-game metal map by Oxyde and the absurd 1024-ish abattoir by William Huber late in the WAD, and Darkwave0000's map was a roomy, expansive, atmospheric bloodbath, just as I've come to expect from him. My real favorites, however, were the genuinely tense scenarios offered up by Necrotikflesh, especially "Abandoned Place", which worked wonders with the use and reuse of that dark warehouse. A nice surprise, as I've never encountered any of his maps before these. On the flipside, most of franckFRAG's tiny 1-3 room offerings were just a little too insubstantial for me to remember them much at all by this point (other than that they were really tiny), and I felt a lot of the concept- or gimmick-based maps by ZyklonB and Datacore were very hit-and-miss. The early map by subject_119 was very obviously a beginner's map, but far from one of the most unpalatable examples of the style I've seen.
There was a goodly amount of fun to be had in those couple of afternoons--pretty good result for what was basically a collection of small speedmaps. Kind of makes me feel like re-mourning the death of Necromantic Thirst, though....since if I'm not mistaken, many of these authors would have had maps therein. But alas, might as well appreciate what we've got, and I'd recommend 3 Heures d'Agonie to most fans of short, sharp blasts.