Well, it works well enough for what it does, and I don't notice any problem with volume drop when engaged, but I've gotta say it gives you a very mild tremolo, with little adjustable effect. And when you compare it to the Electro-Harmonix Stereo Pulsar, it gets very badly blown away. The Pulsar can give you a deep, heavy throb, with choppy square waves that drop off to total silence, it will give you fine adjustments to the front and rear of the wave, and it can even imitate a backwards played guitar track! Get this only if you want the simplest tremolo possible, and if the Boss pedal size suits your setup. I think it's time Boss updated this little guy.