I just did one that I got an 8/10. Now, overall, 8 isn't bad, but... I feel almost insulted by it, because I'm very detailed. Most MSCs love that, but this one was like, don't talk about the questions. Some of their questions were confusing. Some of the questions only gave a specific scenario, where the question would ask - not verbatim - but some of the nature, did the person say this, "Hello, Welcome to Billy Jo Jim Bob's Best Blinds. How are you doing this lovely day?" And I would have to mark it "no" because they said, "Hi, welcome to Billy Jo Jim Bob's. Are you doing well, today?" So, it wasn't exact, but that's the way the question would read, so I'd qualify it in the answers, where I'd say "this question says this and the person didn't precisely and exactly say this, so I marked it no, but I wanted to be sure to say that they said this, which I find to be the equivalent."
But it wasn't clear whether or not they had to say an exact thing, or whether they had to say something of that nature. The guidelines just didn't indicate it. Also, like they're supposed to point out unique company features, and the person did point those features out, but didn't say anything like "This feature is unique to Billy Joe Jim Bob's".
In any case, I didn't feel like I could honestly answer those questions and be fair to the person being shopped, because the questions were crappy and/or the guidelines didn't cover it. And I got marked down for "critiquing" the questions. I don't remember the MSC, but it was a blinds shop.
But I've seen picky versus not picky in the exact same shop, just a different reviewer.