I purchased this guide to try it out this year, and wasn't very impressed.
The main reason I purchased it is because they customize the rankings to your league's scoring categories, but the rankings for my league's settings (G,A,+/-,PPG,SOG,PIM,DG,S%,GAA,W) produced some very strange results.
For example, Alex Steen was ranked 3rd overall among skaters, and Steven Stamkos was ranked 19th !!
Other rankings made more sense, but bottom line is that you have to make quite a bit of adjustments to take out the strange results, so you might as well do your own rankings anyway.
The guide itself has a couple of useful articles, but nothing earth shattering. The team by team coverage was weak with very few player profiles.
Overall, I would not recommend it