Just saw this today, and was a puddle by the end of it. An absolutely wonderful movie. As many critics have pointed out, it is far more universal in its theme than just a 'gay cowboy movie'. It shows how not following our heart, in this case because of societal pressure to behave in narrowly-defined ways, can lead to great pain, not only for ourselves but for those around us. Everything from the cinematography to the direction and the performances are wonderful.
I was expecting a good movie given the praise, and knowing Ang Lee directed it, but I was surprised at how much this movie got to me. It's going to resonate for a long time.