I want to preface this by saying I love the machanics and the actual crunch behind everything. What I hate, loathe with a passion, and cannot stand, is the layout. I either have to full screen this pdf to cycle through it or risk it skipping pages. The color palletes for their tables make it even more difficult if I'm trying to find important information, and in general parts of the mechanics are buried so deep in fluff that I often end up getting corrected by my ST about something I thought I knew. The bookmarks are also remarkably lacking, but that is pretty minor compared to whatver this double page layout fad is.