I have an SEM and absolutely love it. This pedal is never leaving my board. I disagree with the comment above about the chorus, I find it to be quite warm, definitely warmer than the Clone Theory. The flanger has a unique sound to it, and can get quite metallic when the depth is at max.
The filter matrix mode is just a frozen flange, not oscillating, and you can leave it anywhere in the sweep range. At certain frequencies, it gets these weird resonances, and can get very hollow and bell-like.
Awesome pedal
