I will never use another clip on tuner again. I couldn't figure out why I could use one of those other clip on tuners, but my guitar still didn't sound in tune. Why is it one tuner tells me I am in tune while another tuner says I am still sharp or flat. Well, after a call into that very famous guitar product company to ask about their new clip on tuner, I was informed that the segmenting of their LED display had a + or - 2 cent tolerance. That means you can get one string to say its in tune but its really -2 cents flat, and another string says its in tune but its really +2 cents sharp. Don't think you can tell that there is a problem there? Then you probably need to get your guitar professionally setup and properly intonated. Because I can DEFINITELY hear the difference between that kind of crap tuning and using my new StroboClip HD. The StroboClip HD is amazing. And if you use the sweetened tuning for your electric or acoustic guitar, it gets even better. My guitars have never sounded so sweet! I will never use anything other than a Peterson Strobe tuner again. That simple.