tc electronic UniTune Clip Tuner Noir

The basic function of the tuner is great - precise, well readable and fast. Built is solid, especially the clip made of metal.
The main weakness is limited adjustability of the clip (rotation of the tuner on the clip would be preferable in order to hide this rather big clip-on tuner behind the headstock of the instrument) in this regard Fender's bullet tuner is unbeatable.

Pros
Made of metal: Durable.
Accuracy: Great.
Display resets itself depending on the tuner position: Great.

Cons
Danger: You might be tempted to pull it out of the headstock by grabbing it when the device is folded. That would destroy it. So remember to unfold it first.
The buttons are unnecessarily flush with the device's casing, so they don't stick out. This is a flawed design in my opinion, because you don't find them easily and you have to press hard to be sure to activate them.

In short, I recommend them.

Works fine. Sits nicely on the back of the headstock of my guitar (Ibanez S470).

The build is of good quality. I expected it to be more reliable while tuning in loud environment. Its just comparable in that expect as the cheaper options