I am also amongst those who were super impressed by Yale after the 2nd look weekend. The students were absolutely amazing, some of the nicest, most interesting and laid back group of people I have met in the past couple years...the kind of people you want to be your friends. The faculty was also very down to earth (they were impressive individuals, but did not let that get to their head). Some of them actually came down and had drinks with the students during the "Club Pre-med" social at night. The yale system is also fantastic and liberating in the sense that it ensures you that Yale is about helping you learn rather than memorize and compete with your classmates. What I also really loved about Yale, was its sense of community; the fact that you were part of a greater whole and the people around you whether they be those in the school of arts, architecture, or those in the law school are all amazing, interesting, and the best in their field. I found that very refreshing and inspiring.
I would say Yale is a very unique and special place, but it might not be the right place for everybody (due to its system and so forth). For me, it just fit and I knew it by the end of the weekend.
Good luck everyone with your decisions.