Upgrading my rating here after taking the Slick to rehearsal. Didn't have my Mesa so an old Fender Twin sat in. Very good tone through that amph. This thing is getting better, not worse. It especially likes a bit of juice from the Blues Driver, Sparkle Drive or Full-Drive 2. Also reacts well to as bit of light compression through the one I love, a Diamond. Seriously, a lot of tone and attitude for modest price.