I wanted to vote graphics better than tolerable but not quite good overall - even though it was good in places. The story was okay (but not much to it) so that was tolerable - but entering the room I got objective complete while I was creeping in - that really needs a more local trigger plus one of those 'face' triggers with a delay so you have to 'see' and have time to realise what it means - or at least connect it with the objective complete message.
Other than that, I played on top difficulty but didn't quite find all loot so didn't finish. Everything ran smoothly though and I enjoyed it. I liked the background sounds outside at the start - very atmospheric. I semi-ghosted but caused quite a lot of low-level murmurs plus several big busts where I reloaded all but one.
A lot's gone into this so thanks - a nice standard Dark Mod mission!