I am replying as the wife (and girlfriend at the time) of a Marlboro alum. I was also accepted at Marlboro (many years ago LOL) but chose elsewhere because Marlboro did not have any curriculum for those wanting to go into education. However, since I never ended up in ED I wished I had chosen Marlboro.
Because my husband (then boyfriend) was there, I spent a lot of time there, even to the extent of entire semesters (as off-campus study from my college) I LOVED Marlboro's lifestyle at the time. And from what I see about it, it has not changed much. We hung out regularly with professors there, spent time at their homes, having great discussions and parties. There was always great entertainment, dances, bands, theater, music.
The Vermont countryside is spectacular, the cross country skiing great (we cut some of the trails that may still be there today - the Ho Chi Min and the Boy's Room) and my husband put up many of the "climbing routes" that exist on the buildings.
If you are from a small town/small school, I think you will feel very comfortable there. If you are used to a large metropolitan existence, well it may seem awfully remote, you have to make your own entertainment.
Academically it is rigorous, but it will train you well. My husband ended up getting accepted to Yale School of Forestry and Environmental Studies where he got his Masters and went on to get his PhD in population biology (at Yale).
I wish my son would apply, but he is a total math nerd and wants to go to an MIT type place. There are not many math courses at Marlboro. It is TRUE liberal arts school.
I think Marlboro is a unique place. We give yearly to their capital campaign and have named the college in our will (not a joke) It is a GREAT place. I wish I could go back in time and go to school there.
Best of luck in your decision