Really good product for the price!

Works like a dream. I have tried it with acoustic and electric guitars, and it is fast and simple to use, every time. I have also compared it to mic based, line based and amp based tuners, and it has simply been the easiest and most accurate to use. I wholeheartedly recommend the product.

Update 14.11.2017:

I dropped one from 1m to a carpet and broke the power button (bottomed out). So handle carefully. Otherwise 5/5.

Update 20.8.2018:

Second one has not been dropped nor mishandled, but the display has been acting up for a while now. Dropped rating to 2 stars because of weak durability.