I got this little gem last week - it's great for hooking up effects and switching, and is fairly decent at powering, but I think this is where the problems arise. It goes up to 500mA, but two of my effects need more than that, so I have to use separate power supplies for those. Even without those, I'm getting a lot of noise and after trying to narrow it down to the source, I can only conclude that the unit itself is noisy.