A very good and immediate responsive tool with very good effects that will add an extra quality to your sound. Good for for all kinds of intruments or studio bus. I kept it all these years for the chorus....it is unbeatable - one of the few models where you can vary the settings either side and get that Pat Metheny Lexicon type chorus.
"If you want four simple studio effects in one box, you've got it; if you want almost instant gratification when it comes to editing effects, you've got it; and if you want to concentrate all the unit's power to give you one big studio‑quality stereo reverb, you've got that too. The Studio Quad is an effects unit that virtually anyone can make use of straight away, yet it'll take a long time to grow out of. Digitech definitely have the right idea." Sound on Sound Magazine