I have tried many choruses including some higher end and I have to say, this is the best chorus (IMHO). The CM XII has two seperate identical choruses that can be set different, then alternated with a stomp on the switch. As far as quality chorus effect...this is it! The only reason I didn't give it a perfect 5 is that it has its own internal 12V converter, which is a good feature for most guitarists, however, I would rather hook it up to my own DC power source than to have to plug this into a 110 AC power source. As far as sound, well look no further. If your first priority is sound, look no further. The CM XII is the best!