Playing this through the clean channel of my Mesa Rect-o-Verb 25, absolutely blown away the tone on this pedal. Very thick and meaty, almost gutteral in its sound. I sure don't have a real VH4 to compare it against, but it sounds extremely close to the sound of bands that use VH4s. Adjusting settings on the amp really affect the amp's response to the pedal, you can get a very wide variety of tones out of it.
The price is steep, but it is well worth the cost. BUY IT NOW