Hillery eventually learned not to say everything that came to mind. Some were too good not to write down.
In The Reichenbach Fall it's Moriarty's turn to show off, Watson's turn to show up Mycroft, Molly Hooper's turn to matter most, and Sherlock's time to see he does have more than one friend in the world—so of course it's a showstopper from beginning to end.
Aside from the story of the crime what we have here is the evolution of the Sherlock/Watson relationship. And hey, that’s swell. It’s even quite funny in its moments, but as a whole the episode doesn’t hold a candle to anything else in the series.