My daughter attended this program and thought the experience was great. It is mostly math majors but she was cs/math and found a few other cs people there. I think the US side is still administered by a prof out of St. Olaf. I don't know application or acceptance numbers but I recall her mentioning students from small LAC's, UCSD and Yale. I think you will find a few St. Olaf students.When she applied to grad school, one prof told her it was a very good program.
Here is information and application http://www.budapestsemesters.com/