I've seen this several times, so I thought, "I should be able
to figure out what's going on without conning the synopsis
ahead of time."  Wrong.  I spent the first half of the opera
trying to remember what people's names are, and trying to 
figure out what was written on the piece of paper somebody 
was waving around.  The plot was vastly more complicated than
I remembered.  It involves no fewer than four critical documents,
all played by a piece of blank paper folded in quarters.  And
there were a couple of events I remembered that didn't happen -
I now think they happen in "Cosi Fan Tutti."

The Cherubino was the best I've ever seen.  Cherubino is a 
male juvenile delinquent sung by a soprano.  Opera seems very
fond of this sort of thing.  At least Cherubino is funny.  Der
Rosen-cavalier is just disgusting.  It helped a lot that the
Count was more than a foot taller than Cherubino, and inclined 
to make the most of that when he got annoyed with Cherubino.
He was also very good.