I bought a Sweetsound Ultravibe a few years ago and it's had a few problems. At first the led didn't work so I sent it to Bob and after talking on the phone, he seemed a real nice guy and he sent it back, fixed. No problem. For the last year or so the UV has been working only halfway, as in the sweeps are only half as long, and half in depth. The speed of the chorus /vibe is also halfed, until I reverse the polarity by manually unplugging and turning the plug around. And even then the unit will reverse it's own polarity in the middle of a gig, so I have to do it again! Either way, I've been trying to contact Bob at the number provided on his site. After 5 tries with messages, it looks like a dead end. To top this off, the on/off button broke last night! Went right inside the unit; the small light duty switch. If anyone has a clue on how to reach him, or someone to fix this, I would appreciate it!