What is your opinion of this product?
I've used Boss tuners since I first picked up a guitar. I started with a TU-12, moved to a TU-2, then upgraded to a TU-3 when it was released back in 2010. They always did their job without fuss, so I never thought about them very much.
Fast forward to 2016. Like many other guitarists, I decided it was time to simplify my setup and put together a mini-board, so I purchased a well-reviewed mini tuner to replace my trusty TU-3. Immediately, I noticed a difference in tone, and not a good one.
I didn't put two and two together immediately and realize that taking the TU-3 out of my chain caused my tone trauma. In fact, I might never have figured it out if the mini-tuner that replaced it didn't happen to suddenly stop working. When I replaced it with the TU-3, my tone improved drastically. Everything was more open, highs returned, and my overall guitar sound was significantly better.
Every board needs a tuner. Might as well make it the TU-3 since it will also enhance your guitar tone.