Has anyone ever tried any of the projects in it?
I've built several of the projects from the book (most of the distortions, the EQ's, the little preamp and others I think). They all worked as advertised. Some people are turned off by the bipolar power required on most of them but if that doesn't bother you go for it.
I've still got to build a couple of the tremolos and the phaser. I wish the SSM chips were available so I could try some of the projects that require them.