My wife and I have had one of these for 5 years or so. It has always worked great. It works with her 12 string acoustic and my electric bass, whether plugged in or not. Qwik-n-easy. It finally died, and we WILL get another one.

I bought this thing as a replacement to my old one (which i loved and it was cheap as heck. this thing jumps around too much. i plugged my electric into my pedal tuner and got it perfectly in tune, the plugged it into this thing and it said my guitar was totally off. on top of all that, the battery has to constantly be changed, and it can't pick up the sound of my acoustic. worst money i've ever spent. DO NOT GET THIS TUNER.

I don't understand why this product has so many bad reviews. I have had it for about 4 years and rarely have to change the batteries. It is extremely accurate. I gave it a 4.5 on quality, simply because it is made of plastic, but it is extremely sturdy/strong. I have been using it for 4 years and it still looks and works as good as the day I got it.

This is a great tuner! Everyone needs to keep in mind that when a string on the guitar is struck, multiple frequencies resonate together to form the pitch.. the flickering needle is actually picking up MORE frequency variants than a solid "green light" tuner. In short it's more accurate than some "green light" tuners that don't accurately display the fluctuations in frequency...fluctuations are there and that's what that "flickering needle" is showing you. Frankly I don't trust a tuner that is so quick to give me a solid green light. I'm not saying that there aren't better tuners, but for the price this one's hard to beat and the bottom line is that you CAN sucessfully tune your guitar with this tuner.

This thing sucks i bought it as a replacement it doesn't accurately tune anything no matter what your pitch is slightly off its cheaply made and has crappy battery life you cannot calibrate it for anything