I have had a Zoom G2Nu for 3 years and wish I had bought this pedal earlier as it totally unlocks the effects box. The tone seems improved even without using the pedal, but it really comes into its own when you use it to control and vary the effect such as Wah, Tremolo etc.
It is also really useful as a volume pedal - you can quickly get the right volume which effects how you hear the tone.
It is also great on"Drive" as you can so easily vary the gain.
It is a must if you have a Zoom effects box without a pedal. It is very well made, easy to plug in and use. I am delighted.
So, you got yourself a Zoom pedal, if you don't get one of these then you won't get the best from it. Well made, solid feel and smooth to use, it gives you exact control over many different expressions and makes your playing better. Seriously, it can make all the difference. Also means I can now get proper wah playing Cliff Burton's Anaesthesia :) Worth it just for that.