Well, it came in the mail this morning! After letting it get acclimated to the inside temperatures, I took it for a spin. There is a lot of compression on tap. Higher settings on the sensitivity knob crush the living heck out of the signal. My "sweet spot" for the sensitivity right now seems to be at about 9:00 with the level set to roughly unity gain. It sounds especially good with arpeggios, evening out the attack and balancing the notes. It's going to take a bit of getting used to. I'm so used to that instant attack when you hit a full chord. That disappears even with a little compression. I played "Walk, Don't Run" and that seemed to really benefit from a little compression. It made everything sound more even. I was afraid it would be like a crutch to cover up sloppy playing. It can do that to an extent, just like a lot of distortion can, but it certainly is not an instant talent button.
I only tried in on my Tele. I'll give it a spin with my Jackson later.