I started to play this mission many years ago but then didn´t finish it. So I searched for it and found it again.
And I am surprised in a positive way. Not only for this age a rather well designed mission, the author did a good job with the standard material from TDP/TG. Mostly a classic manor mission with some hidden stuff and a tad of humour.
The writings are made well(I hate stupid fanon drivel that goes over several pages and does add nothing to the mission at all) and add to the back story. Areas are not too convoluted and you still have a lot of fun to explore the level. There are some riddles which are mostly fair(except for one which is a bit iffy).
Only glitch I encountered that blocking with the blackjack KOs NPCs(even just touching them). Maybe it´s due to the fact that it was designed in OldDark times and not intentional.
Overall recommended - also 20 years later.