The construction is really good, you know Korg pedals already. Sturdy yet light, a pedal that looks it could stand a lot of abuse. Features go beyond expected specially with the buffering option. The visibility of the leds is what makes it special. No matter light conditions, under the sun or in complete dark, you will be able to tune your guitar or bass. Muting during tuning is also useful to not add noise in between sounds. It has the possibility to use a 9V battery in case you want to. A bit expensive but worth every penny.