TU300 : Good pedal, but not great.

Build quality is good. It is plastic, but I do not mind it, it fits my needs and it is quite sturdy for what it is.

Mechanicaly handles as expected. But as a tuner it is not great. It certainly is an ok tuner, just not great, sometimes it struggles a bit with tracking the tone, especially on lower strings, and bass.

It has a bypass output that saved me some headache when I was building my pedalboard, as I used it as a splitter for my bass and guitar chains (I use my pedalboard for recording in my home studio) that start with Boss NS-2 noise suppressor send and end with an ABY switch running to NS-2's return.

Pros: It works, does the job done, maybe not as quickly as some more expensive tuners, but it works nonetheless. That extra bypass output saved my neck, and is a really great addition.

Cons: the tracking is a bit erratic and slower on lower strings.