This is one of the best purchases I've ever done through Bajaao. Previously I was inclined to buy a regular polytune pedal, but was hesitant to waste one slot in my pedalboard. Then I came across this product and took a leap of faith after going through the reviews online. I must say, this tiny tuner is very accurate and the lithium coin battery lasts a long time. Mine is still going strong after more than 1.5 years. I usually tune my guitars 2-4 times a month, so maybe that's the reason. Overall I think it's an essential tool for a guitarist's arsenal who want to keep only essential pedals on the pedalboard.