The rest of the books are, IIRC, pretty good. I do remember that I've kept all of them, although that may be because I'm something of a d20 Modern hoarder. They are at least mechanically sound.

It's odd, they even have prestige classes that affect community stats and things.

Maybe I'll give it a dig through again. I was nostalgically reading my TMNT & After The Bomb books last night before bed.