Williams people are generally friendly and smart. For the most part people work very hard, enjoy what they do, and make the most out of the tremendous amount of resources offered to us. We have generally small classes with excellent professors (I've only had two or three classes I didn't like). Classes here are most certainly challenging, so come prepared if you sailed through high school. The school is only about 2000 undergrads and twenty some graduate students, but the size makes for a close knit community. Buildings on campus, including dorms, are well kept and high-tech (wireless internet everywhere, lots of AV access, etc.). The liberal arts aspect allows you a lot of free reign on what you take. I'm a science guy at heart, and the bio, chem, and physics departments here are all top notch. There is a lot of school spirit, and a lot of athletic people, but not your average "dumb jock" types. These folks are some real student-athletes.
The administration is friendly and try to be receptive to students, but often get caught up in some idea they think will better the community even though most students oppose the change. Cluster housing, for example, is a completely failed system that the administration imposed on the students. Luckily in the big picture it's a minor issue because of the small size of the campus. The often talked up "entry system" and the whole Junior Advisor thing for first years is actually as great as the admissions office plays it up to be, at least in my experience.
Williamstown is very small in terms of population and rather large in terms of geographical area, with lots of great hiking and nearby kayaking, canoeing, and climbing. The town and the student body don't mix too much, and most students stick to campus for social life/parties. Not really any bar scene (a few bars on Spring Street in the middle of campus, but they are tiny and don't attract huge crowds). The Clark is in walking distance, offering free access to their world-class art exhibitions for students. The college's own museum of art is free to all and generally has interesting exhibits. We're halfway between Boston and New York City, making those popular summer internship locals. The Adirondacks, White Mountains, Green Mountains, and (of course) the Berkshires are accessible for outdoor adventures during the semester. I didn't study abroad, but plenty of students do, and have a great time.
The biggest recent issue on campus is dealing with subtle intolerance and racism. I suggest cruising around William Students Online and the Williams website (search "stand with us" or "williams speaks out") for more information on this form an opinion based on the reports of students who have been directly affected.
The food can range from surprisingly excellent to just plain bad. 5 dining halls on campus, so it depends on which one and the day. Good restaurants around town.
Overall, I love it here, and wouldn't change my choice.