I returned my SYB-5 today having received it on Saturday mail-order. I very rarely return gear but I was disappointed with its performance. I've been using a Boss Octave pedal for years, so I'm used to the stability 'issues' with these sort of pedals, but I found the SYB-5 to be extremely unstable. I spend a good couple of hours working with it but it didn't really give me a lot more (certainly not $159 more) than my Octave pedal. So my recommendation is that you should try one before you buy one. I bought mine sight-unseen as I couldn't find any local shops with one for sale. I think I now know the reason why!