Been using mine for a few days now. So far I can say the sound is greatly improved. I’ve used it with my Magnepan LRS+ and KEF R3 Meta’s and both sound better with the Mk2. My REL T/5x subwoofer integrates much better, more seamlessly with my LRS+ speakers than with any other amp I’ve tried. Haven’t tried the phono stage yet but I expect good things.