This was my first official bschool visit, so I don't have anything to compare it to. I live in SF but am a Cal alum. I took the day off to sit in on a class (unfortunately, it overlapped with lunch). I only passed through Haas to get to the Greek or to the football stadium during my undergrad years, so aside from knowing how to get to the building, I did get a bit lost on my way to the admissions office. Luckily, the area is pretty small.
The class was totally relevant to my career goals, so I was pretty excited (and hungry). The students were all engaged yet friendly. None of the cutthroat crap. I also met a student club leader and spoke with his experiences, my career goals, etc...and it looks like Haas is a good fit for me (although I almost always leave these things thinking xx school is the best fit for me!).
Students all seemed really down to earth. A few even walked up to me and introduced themselves (you have to wear a Haas pin that identifies you as a prospective). The Information Session was surprisingly informative. It probably helps that they focused on selling the school rather than talking about admissions strategies. I was surprised that 25% of the students live in SF. They really emphasized the stellar career services center and close relationships with local companies.
I'm currently writing my "Why Haas" essay now while I'm still inspired.