Sorry for the necro, but...
Labyrinth Lord is the D&D I played BITD, and the D&D I want to play today. YMMV. I find it intuitive and flexible, true to B/X-1e AD&D, but verrsatile enough for whatever I need. Just started running it for my gaming noob nephews. Starting off easy, party initiative and the like, but can add things in later, once they start to grasp the fundamentals. And I can do so without overhauling the characters or adventures. I can run any B/X or 1e AD&D module with LL, needing little or no alteration. Overall, it's perfect for me.