The GM kit is a nice collection of 50 pages for Rifts, the majority of the pages are character sheets of various types along with some supplemental sheets. There's also a full list of spells and what page they can be found on in the Book of Magic, along with a full skill list from the GM guide. The logs and combat matrix though are really nice and those alone make it worth the purchase. Now if only the whole thing was editable.
[4 of 5 Stars!]