As a B/X fan I look upon any attempt to emulate or clone it with great criticism. This book does not disappoint. It is lovingly true to its source material while being its own thing at the same time.
The key difference between LL and B/X is that this game takes your PCs all the way. Each XP chart goes through 20th level (or to the level limit for the class). The spells go through their 7th or 9th level limits so you can play your campaign at any level you prefer.
I own print version of bot the LL and AEC so I highly recommend picking those up and buying the full PDFs. The art is wonderfully old school.
Whether you are a game writer creating material compatible with B/X or simply wish to play something like the best version of the greatest game, Labyrinth Lord is right in the sweet spot.
[5 of 5 Stars!]