I have no clue about what happened with that Z review, not do I care to dig into it. My personal experience is that the multibit upgrade was very substantial for the music I listen to (mainly modern jazz, lots of ECM recordings, as well as classical baroque and modern). After the upgrade, transients, such as from drums and especially cymbals, were cleaner, better delineated in time, space, and frequency. The one further improvement I got recently was from a better USB source, the Sonore microRendu, which helped the Bimby to get a bit more precise. I'm just now listening to my pretty decent speaker system (Synology NAS>Sonicorbiter SE>Bel Canto mLink>Bel Canto C7R>KEF Reference 1) in a room with fair acoustics, and I must say that my headphone system (Synology NAS>Sonore microRendu>Bifrost Multibit>Asgard 2>MrSpeakers Alpha Prime) tops it in the clarity department. The headroom I found in the Bimby>Asgard 2 combo when I fed it from a better digital source was quite surprising. In other words, the Bimby will do a lot more for you if it is driven by a cleaner digital source. I suspect that Z and others who have shrugged Schitt multibit are just running mediocre digital sources that inject cr*ppy signals into those amazing DACs. I can't for the life of me understand why digital audio fanatics continue to feed high-quality DACs with off-the-shelf (or even modded) commodity computers that are electrical noise and jitter farms. I've got great value from segregating music storage into a NAS and streaming into a small, dedicated device, the microRendu with a Teddy Pardo PS being the latest and best of those.