I believe it's the opposite. It's not like trust. It's about percentages. So if 9/10 reviewers say that the m9XX is excellent, but 1/10 reviewer says that it's average, then chances are, you'd rate the item as a 9-10 so it would indeed be excellent, if not very good. Of course, this isn't what I strictly had in mind. What I mean is that if say 8 reviewers say that the m9XX sounds balanced with a hint of warmth, and suddenly one guy jumps out and says that it sounds cold and clinical, you need not take it too seriously because this opinion is of a minority. You cannot approach something like this with a theory, it's about seeing enough patterns in the reviews to draw a more solid conclusion. There isn't enough reviews it seems, although the trend is the at the build is excellent, and the feel is as well. The sound is neutral and accurate, but with a hint of refinement that allows for some musicality without being too analytical. Sound stage is good, but not necessarily expansive, and is generally powerful enough to drive most headphones.
A note on the soundstage. I believe that sound stage and dimensions are a form of coloration, so an accurate DAC would probably not be too expansive. As is the case with the m9XX, but being a more consumer friendly product, is probably not without some coloration. Which would be a very good thing. I'm not looking to master or playback master recordings for the purpose of mastering. I'm looking to buy because I love music.
The practical music lover in me is saying go for it. Based on reviews, data and Massdrop's fairly spotless track record, it's a safe bet. Also, there is no getting around the fact that the iFi iDSD is harder to get, and I can pretty much try and get a used one whenever I feel like it. Plus... 5 year warranty and Made in the USA.
a bit over 24 hours to decide.