There are three pieces actually, the core PDF, a Records Sheet, and an Art of the TRO that covers the stuff not used, stuff that went through various steps, and honestly, it's all rather brilliant. Well laid out, very slick looking, and the RS aspect was a pleasant addition that wasn't expected. Keep in mind though, this is not making him a dime, so be sure everyone spends a moment thanking him for his efforts, him and his fellows that is.
I would really like to see the standard XotW articles for these, but for fairly obvious reasons its a good bet that none of them will ever show up here.
Oh, and the Art of bit also added a "bonus" vehicle, an ADA unit for Capellans. In short, the whole thing is amazingly well done, and also generally well thought out but not stuffed to the gills with overly optimized units (there are a few, yes, but not the majority really.)