I really like the rotary effect. I like the way it just elevates an organ sound, and the way it works like a sort of phasery flangy type of guitar effect. At the moment, I've got three of these, as I think they sound fantastic. I use them for guitar and bass, to get some really nice and sweeping sounds. Lately I even bought one to use instead of the build-in rotary on my organ keyboard, as I think this just sounds way better. Especially with the build-in overdrive, which gives you a really nice crunch on your tones. If you're looking for a very good rotary effect for a great price, I would say look no further. This is an absolute must have for rotary enthusiasts, and easily beats many build in rotary effects of keyboard, in my opinion at least.