PolyTune Clip Tuner : Great tuning but build quality not as good

More suitable for electric guitars, though also works on classical, but the clip gets really high on tension, as on classical guitars the wood is bigger. Still fits though.

pros & cons

Works great from the get go, even without reading manual. Just put on headstock and strum. It detects even lighter strums that other tuners do not. Great feature is that if you strum all strings, it gives you feedback for all of them, that probably the best feature.

The clip and front are aluminum, but the back and the battery door are plastic and not very good on mine. On one side the plastic cover has a tiny gap. The major problem with mine is that the battery does not fit well, and you have to push the plastic door to fit it, and after that the plastic is all flimsy.

Overall I do recommend it, but have in mind you might get one with problem on the plastic. I think if they made all aluminum there will be no warping and this will be the best tuner of all time.