I have it. Basically it compiles a VBD cheat sheet for you based on your (or their default) projections for the season. Pretty useful since their database lists every player at the start of the season, so you don't miss anyone. They have some flexibility for scoring systems, but it should be more configurable.
For example, for performance scoring they offer groupings of 10 (0-9, 10-19, 20-29) for TD scores, but what if your league goes by 15 or 25 yards?
All in all, for a free tool it's pretty damn good. Even has support for keeper and auction leagues. If your league stats fall within some of the non configurable options, it's even better.