ok so after visiting both this fall, here is my input:
Georgetown: The law center is located right down the street from the Capitol Bldg and about 40(?) blocks from the undergrad campus to and from which a shuttle runs periodically throughout the day. There is a huge benefit from this which is rarely seen at other schools: the law students therefore have their own everything. There is a new fitness center just for the law students which is absolutely sweet, a really nice quiet (although it was under construction when I was there) library, a residence tower for first year law students, and a commons area type bldg with classrooms and a nice cafeteria style restaurant(food is decent-good). I found it rather impressive that Gtown was able to make the little law campus feel like a "campus" and not a city block. Compared with GW, which is in downtown DC and very much lacking a nice campus, Gtown feels very nice and secluded. Finally, there are two solid Irish pubs within about 100 yds of the law campus. I'm sure there is plenty more nearby, but I didn't get the chance to check it all out.
Cornell: (Disclaimer: I visited on a stunning late summery day and cannot comment on how bad the winters get) The law building is located adjacent to the undergrad campus and right on the edge of the little collegetown of Ithaca. That part of upstate NY is really beautiful, and the natural scenery (gorges, waterfalls, etc.) is amazing. The town is extremely hilly (which I would imagine contributes to the difficulty of winter transit) and biking is extremely popular as there are many different paths one can take out of the town (mountain or road biking). The town has a really friendly feel to it and is populated by many good restaurants for how small the town is. The law facilities are extremely old and well kept and gives off an air of prestige that new buildings cannot match. The thing that really stood out to me was how quiet it was all around the campus. Also, the library reading room was absolutely incredible. It reminded me of Michigan's, but a little different in a way that is difficult to explain. It isn't better or worse, just different. It definitely made me want to crack a book then and there.
Overall, I loved both schools. The atmospheres are distinctly different but each has its own benefits. The staff and students were all very accomodating at both schools and I personally felt very welcome. I get the impression that the schools are of very similar quality, so it will likely come down to cost and atmosphere. To each his/her own.