FMA: Brotherhood is, in no uncertain words, an endlessly impressive show.

Just when you think you've got its number, it surprises you. I've never seen an anime manage to stay so engaging for so long. Everything it does, it does well.

Three nitpicks:
--The pacing is just a tad brisk at some points, particularly during the first half. As a result, there are some moments that weren't as impactful as I think they were supposed to be, because they didn't have enough lead up.
--I wish Lan Fan had gotten a bit more action, especially with her new gear.
--The final five episodes or so throw a lot of fantasy at you, and you're kind of just expected to go along for the ride.