I purchased a Modi 2 MB and enjoyed it. It replaced an ancient (circa 2005) HeadRoom MicroDAC. Much fuller sound - not as black of a background as the MicroDAC, but less cold and distant.
I upgraded to a Gungnir MB. It gave me everything the Modi 2 MB had and then some. More resolution, blacker background, micro and macro detail improvement. It also had 3 outputs - 1x balanced, 2x single-ended. Inputs include toslink, usb, coax, bnc. I really like it - even though it clicks when switching to files w/ different bit rates / sample rates (i.e. going from 16/44.1 to 24/96 or vice-versa) and it clicks repeatedly if I put my CD player on pause. I think those are the only two issues I have with it. It is pretty barebones, though - no fancy OLED display, remote, and the power button is on the back. The input indicators are somewhat cryptic, but unless you're terribly dull, you'll have those figured out in no time flat.
I'm in the process of saving up for a SACD player to replace my CD player, and I'm considering getting a PS Audio Stellar Gain Cell DAC/Preamp to sort of serve as a "hub" for all of my gear (headphone amp, integrated amp, phono pre amp, SACD player, PC, DAC, soon-to-be obtained tape deck, etc.). I've heard good reviews about the DAC function of the Stellar Gain Cell DAC/Preamp, but it would have to be really impressive for me to consider removing the Gungnir MB from the chain.
I read a few posts from time to time written by individuals not satisfied with Schiit's customer service. I've contacted them on a handful of occasions (usually to ask about compatibility - not if something will sound good together, but if they'll actually FUNCTION together without blowing up), and they've been very helpful. My take is that they don't mind answering objective questions (will TUBE X work with that Freya? Is Gungnir's output too "hot" for my headphone amp's balanced inputs, etc.), but they don't engage in much speculation, or subjective stuff (is the Gungnir MB that much better than the non-MB version? Does Vali 2 sound better than the Cavalli amp that just dropped on Massdrop?).