I don't know any details, but I'm thinking that their previous pedals probably didn't work out too well for them. Every one that I had sounded very cool, but was built like complete garbage. When they worked as intended, they sounded great. But I had nothing but problems with them. They screwed me up during gigs several times. This is really unfortunate, as I was hoping for them to be great, and I bought the Pickup Booster as soon as it was released. But in the end, I think they were very expensive for the level of quality to which they were built, and over all unworthy of wearing the S.D. badge. And they must not have sold very well, as they were being blown out very cheaply in the last year or so.