<HTML>Hi,   I have been using an Accutuner for years,and bought Pocket RCT at the= Chicago convention last year.Today I had to tune some practice room pianos = at Erskine College,and used the RCT for the first time.I actually set up bot= h units,and tuned each note from A0 up,with both at the same time.They diffe= red only slightly,in a few places.One was right below the first break,anothe= r right at the next treble break.I believe you would have gotten a good tuni= ng with either unit,as it was not a major difference.The last octave and a h= alf,the Accutuner seemed to really want more stretch,but I could have taken = it gone with either way.The piano was a Yamaha U1. Best, Hazen Bannister</HTML>