This tuner is quite a bit more accurate than other tuners I have used. Additionally, I was a bit concerned about whether or not it would be sensitive enough to pick up string vibration on my aluminum bodied pedal steel. IT WORKS! even on the high A! Highly recommended, easily worth the cost.

First of all the tuner itself works great - I also own 3 StroboStomp pedal tuners and this clip on model seems to work as accurately as they do.
Improvements that would make this an immediate 5 star review for me:
1) Changeable color modes to make it more easily visible in bright lights or sun. The StroboStomp model has it and you need to pay $ additional for the next level model. For $, far more than most every other clip tuner, it should be on this model IMO.
2) You need a micro size Phillips screwdriverto change the battery. Who wants to have to do that in the middle of a gig? This is a horrible design. I own lots of remotes and devices that have a battery cover without a screw and none of the batteries have ever fallen out.
If these two things don't bother you then by all means but it - it does tube more accurately than any other clip tuner I've used.

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After years of using other tuners, I finally ordered this Peterson. It takes a little practice to get comfortable with how it operates, but the effort and attention is worth the payoff--absolutely stellar tuning for my acoustic guitars and mandolin! I have realized that I was attempting to bend strings into tune while playing lead, but problem solved now...the sweetened tunings for the acoustic and the mandolin are a huge improvement over other clip-on tuners I have owned.