I am excited to own the gold standard in tuning. When you own a Peterson tuner you own a quality machine that performs to its reputation. The auto-select and manual-select options for notes is a great feature to meet any need. Also the metronome on the 590--heard by built in speaker or headphone input-- makes this machine a musician's one stop shop for practice and performance. If you want accuracy, quality and consistency for your instrument you need a Peterson!