I'm using this EQ together with my synthesizers and it works perfectly. I mainly chose this pedal because of the price and the selection of the bands. The EQ bands have not disappointed me. They make a lot of sense for synths.
The only thing I can comment on is that when centering the sliders, they are not exactly centered the same. We are talking about a very, very small variation that does not make any difference in sound and barely in looks either, but I did notice it immediately. On the plus side, they do have a little notch they "click" into when centering, so it's easy to quickly center all the bands.