Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good Stuff.

This tuner is so awesome, I bought one for my grandpa! I've read a few reviews from people who have had issues with these tuners, but the solution is right in the directions for the tuner. Different instruments have different "hot spots" by moving the tuner 1/8" you can go from a weak tuning vibration to one that works perfectly. If you are not ready to buy a rack mount tuner this is the best bang for your buck. Works on guitars (acoustic and electric) as well as banjos.