My instrument (NS/Stick) utilizes active electronics which are activated whenever the instrument cable is inserted. Between sets, when the instrument will just be sitting for a while, I like to unplug and save the dual 9Vs in it. Of course this is a hassle for the sound engineer and myself, making sure my channel is muted, etc.
The Korg Pitchblack Poly completely solves that problem. But wait, there's more! It's also a VERY accurate, very easy to read instant tuner which just happens to be built like a tank and fits easily in my gigbag. Just click the pedal anytime you want to be muted and take a couple seconds to fine tune a bit, it makes all the difference when you're concerned with doing the best you can.
Sweetwater has been a joy to work with through the years, from GREAT sales staff (Mike Picotte is the MAN!), to FAST shipping (usually overnight to my location), a fantastic return policy, great pricing, great products, easy website...You just can't beat them.