Pros
There really are tons of opportunities. As an intern, you have committees and subgroups, you meet a lot of people, and make a lot of contacts. People want you to succeed, and are supportive of you exploring around. All the poeple I've worked with and have met have been extremely motivated and intelligent. Dublin is a great place.. very close to Columbus, but far enough away that your not downtown or anything. There is a mall very close, and great places to eat, and cute places to live. The cost of living in Columbus is very low, very nice. So you don't have to worry about that. Interns are paid very well.
Cons
The only thing is lack of organization! It seems that there is a lot of rework.. and when you start.. forget about having your desk set up. You will be working for at least a full week without a computer... this has happened to me twice and to at least 5 others that I know, in varying levels of the company. I also think your experience is dependent on your manager as well. I had a great manager first who made my experience amazing. However, I had a friend in a different group, and she dreaded coming to work each day.