Top positive review
Updated review: Cheap and work very well! A bit slow to change while tuning though.
April 29, 2019
Updated review: I'm lowering my initial review to 4 stars because when you hit a note it holds the tuning for a long time before the display will change as you tune. Great for practice but I wouldn't advise using on a gig when you have to tune more quickly because it won't keep up. They ARE every bit as accurate as a Snark though, just not as fast to respond.
4 for $16? Wow what a deal. I'm always losing them so this is perfect for me. I attached all 4 to one of my basses and each read the exact same. Also compared them to my more expensive Snark and they are spot on.