Sam Finegold, Harvard Class of 2015 studying Statistics.
Living: The living at Harvard is very good. The housing is comfortable and the community created in the housing system has led to strong friendships.
Academics: This is a mixed bag depending on the field of study you are in. Professors in the Economics department are less accessible because they often committed to their research and their is a large student to teach ratio. Professors in say, the Earth and Planetary Sciences department, are known to be more accessible. That said, if you go to professors' office hours, it is easy to develop strong relationships with faculty.
Extracurriculars: Something that distinguishes Harvard is the extracurriculars. Many students are involved in the Institute of Politics, in Harvard Student Agencies, in Hack Harvard, in The Crimson, and other large organizations which consume a lot of time. Participating in college extracurriculars is helpful for professional development and can be fun. If you are interested in having a life full of activities outside of the classroom, that is definitely a reason to consider Harvard.