Great, natural sounding tape style echo. Superb control over modulation means everything from mild to wild is possible. Mix control is great for keeping everything under control or not as the case may be. Preamp adds some nice high end sparkle to the repeats. The self oscillation is the smoothest I've ever heard. Build, fit & finish is as good as anyone. This one's a keeper & definitely a builder to keep an eye on. Excellent service as always from Jim at Boost. Recommended.