Yeah, it took me like 5 seconds to Buy That Now; I'm glad it was on my wishlist!!

It came in pretty good shape too, though maybe smelling a bit on the musty side.
I will say, however, that I think
Dark Dungeons is actually a pretty good improvement in a few areas, like extending the demihuman advancement charts and clarifying some bits with initiative. Since BX/BECMI/RC evolved, some rule reconciliation can really help. If/when I run an RC game, I very well might use some of the tweaks from there instead, much like I did with OSRIC when I ran AD&D.
One of my favorite little bits of streamlining: I used the "d20+attack bonus+target AC vs. 20" attack rolls in my AD&D game a few years back, and I found it to be simpler than futzing with a chart while maintaining the math. It's presented very clearly in Dark Dungeons.
(I checked out
Darker Dungeons, too, and while it has a few neat bits, I think I prefer something closer to the original.)
-O