I just graduated, class of 2011, and I lived in Keenan all 4 years. In terms of dorm quality, it's pretty old and not the best. However, the quality of people in the dorm is top notch. Amazing people make up this dorm community (hence the multiple dorm of the year awards).
There's no AC, but just get a big fan and you'll be fine. U don't really need ac anyway cuz it's cold majority of the year, starting in october all the way to even april.
The location of the dorm is amazing: North Dining hall is literally less than 50 yards away. The library is a 5 minute walk. La fortune is about a 3 minute walk away. The health center is right behind the dorm. These things alone make the dorm a very good place to live, especially during the dead of winter/and you are a science major. If you are a business major, it would probably be better to live in south or west quad, closer to the mendoza building. (business majors don't really need the library).
People argue that north and south dining hall are equal or whatever. I would say that North has better lunch (they serve breakfast, and there's a cute girl who makes a salad for you), and South generally has better dinner. I ate a North a lot because it was right there, and I don't have to walk a long way in the cold.
The basement is really sweet. I don't think any dorm has a better common room than Keenan. It has a mini theatre w/ projector room, and a huge room w/ couches, tables, big tv, ping pong etc. Plus the Zaland pizza can't be beat, only 1$ a slice. There's also a council room on the other end near the weight room along w/ a mini library. There's also a music room.
And lastly, Keenan hosts the best dorm event out of all the dorms: the Keenan Revue. Tickets sell out in 10 minutes. As a keenan resident, u automatically get 4 tickets, and you'll be able to take some lucky lady to see the show.
Unfortunately, St. Mary's this past year disallowed keenan from using there auditorium for the show, and so we had to use a venue on campus (Stepan Center), which allowed the ND event people to censor the show... because Taylor Swift's brother complained about something.. and yeah its kinda complicated. So I'm not sure what will happen this upcoming year. The show also cost a lot more money to host on campus.
So any Keenan Alums out there, please donate to the dorm so the Revue can still live on.