Well, they were based on the original d20 Star Wars and not the revised version thats more like 3rd ed, but its not too bad. But it is annoying in some respects since they list speed categories, but don't have actual grid distances moved like the new ships do. All a part of the problem with the book not working totally, but you can fudge numbers with the GM over speed and stuff. Otherwise its fine. D20 Future is ok, although its probably not what I'd suggest for making Star Wars stuff. But making mecha with D20 Future is fun though. ^_^