If you're struggling to buy all the first 4 BECMI box sets in a hard copy, or are stil waiting for the PoDs, then this is what you need. It has a ton of information and alternative rules, such as Demi Humans leveling up to 36th level. I really enjoyed reading the book even though a few of the rules are just cumbersome. If there is one negative point for me, it's that the BECMI box sets had much better art. Overall, I highly recommend it.