This is an excellent utlity pedal that does exactly what you'd expect i.e. gives you serial and parallel effects loop capability on your pedalboard but with the added features of a pre-amp with gain, eq and boost options so you can make sure you don't lose signal when kicking in vintage pedals and the like. A particularly useful feature is the large blend knob you can operate with your feet for fine-tuning fx level. I'm using this with a Morpheus polyphonic pitch shifter and the X-Blender instantly turns it into a footswitch-selectable harmoniser and I can easily turn the harmonies up or down with the blend knob, or switch back to series loop for straight pitch shifting. The X-Blender is well made, easy to use, and does exactly what it's meant to.