I use it for two years now both on stage and in the repeat. A pedal tuner for high quality as the strength (that is the BOSS, you can practically jump on him without her bronchus). I use it coupled with an NS-2 from the same brand. An amazing duo for a clear and precise. I also used the studio, no worries on that side.
Quality, it is paid. Like all BOSS pedals, these are expensive, but there are often actions on different ranges of pedal. I would do that choice again!
(I put 9 because of the price)