At CanJam I heard it off some little portable DAC situation they had going just plugged directly into my phone and it sounded amazing.
I heard it at CanJam and thought it was fantastic. It think he just had the Apple dongle going into it or something crazy simple DAC-wise. I had my Caldera around my neck so I plugged that up and it was perfection. I'd need to really sit down with it for a while, but it didn't make all other amps seem totally inferior to me in that flash. It was really, really beautiful sounding and clearly a special handmade object. As a fellow tube enthusiast chasing more beefy sound profile (Cayin HA-300 mkii) I vastly preferred the 465's sound to a typical solid state. It had the magic and body that is usually lacking for me.
Two other solid state amps made a really positive impression on me at CanJam SoCal for having a less solid state sound. The Nitsch DSHA-3FN has a unique top end character and holographic quality, and the HeadAmp CFA3 was bold and meaty with the Caldera. Those are both revivals of really cool amp designs.
Anyway, Mass Kobo is def one of the best amps I've heard, but maybe don't go selling your cars and riding a bike everywhere just to buy one. That's what I'd have to do.