I think the ending of Anathem is possibly one of his best; it’s an acknowledgment that it is the ending, it’s rather tender and sweet, and it fits the mood perfectly.
Yeah, I think of Anathem as so far the only Reverse Stephenson book. Most of his books have killer starts and then end in a didactic "meh". Anathem starts with an incredibly didactic "meh" but then delivers a killer end.