First, let me state that I am not a piano tuner. I'm a pianist, and I'm very fussy about the piano that I play being in tune. I have a tuning hammer and some mutes and know enough to get myself in trouble. Prior to using the auto-strobe, I could never have successfully tuned a piano on my own. Now the review: I was first introduced to the Autostrobe tuner by the owner of a local piano store. He used one of these tuners to tune the pianos he delivered. As soon as I watched him fly through a piano with his tuner (faster than I had ever seen anyone tune a piano before) I knew that I had to have one for myself. I knew enough about tuning pianos to touch up unison notes and replace the occasional broken string, but I don't have the experience or know-how to get a temperament right or tune a whole piano. With the autostrobe tuner, I can now tune a whole piano with minimal frustration. It may not be a perfect job, but that's not the fault of the machine - it's me that's the problem. This little machine will help you get every single string exactly where it belongs. I can't imagine another tuner that would work better. It's been a tremendous help to me. I still have a professional tuner come by every few months. I'm admittedly an amateur, and I feel better still having them go through the piano from time to time. But now that I have the autostrobe tuner, I'm more than capable of touching up the occasional note that goes sour, or even running through the whole top end to make it clean and bright again. I do think that with more experience, I'll do an even better job of tuning on my own, but for now I'm happy to just fill in the gaps between tunings. I should also mention that if you ever tune your guitar with one of these tuners, you're never going to want to tune with anything else. Of course, it's really overkill for a guitar, but even if you're used to a well-tuned guitar, the absolutely perfect tuning that you get with this machine will blow you away. So, in conclusion, if you're a pianist who is fussy about tuning but can't pay a tuner to come by every two weeks, this little machine would be a big help to you. I don't think it's a replacement for having your piano tuned by a professional, but I could see even Professional tuners finding good use for a machine like this.