Here’s what he has to say:

Over the years I’ve owned many boss products and I can tell you I’m never disappointed. From the Boss DD-7 Digital Delay to the TE-2 Tera Echo and latest purchase the Boss RV‐6 Reverb, all are equally true to their cause and are well worth every penny. The Boss RE‐20 is all of those three rolled in to one. The panel styling is true to the original hardware, with its black, silver and green livery and the famous 12-position Mode Selector knob takes centre stage. This determines what combination of the three ‘tape’ playback heads are being used. Positions 1 to 4 give you echo only, positions 5 to 11 let you add in some spring reverb with slap-back delay features and position 12 is reverb only. The Bass and Treble controls are available to shape the sound you want for the delays, with separate knobs for the reverb volume and echo volume. The delay time can be set using the Echo Rate knob or tap‐tempo pedal and the motor‐speed knob of the original TE‐2 is mimicked to the extent that it takes several seconds to settle down to a new speed. The Intensity knob sets the amount of delay feedback and a further knob sets the input level. A red clip LED gives warning of overload, which can sound like the ‘mother ship’ coming into crash land. I find there’s enough headroom and gain range for the unit to work in an amplifier’s effects‐loop or as a regular stomp pedal in front of the amp, or head unit settings. Undeniably this is a real top of the range pedal with an easy to arrange set-up suitable for any evolving guitarist or musical adventurer! I’ve even used this device on bass, keyboards and even vocals, each creating another world of their own. Star rating of 4 ½ out of 5 stars. SEE A QUICK VIDEO DEMO.       Purchase here!