I am currently a 1L at Seton Hall, and I got in through the LEO program also. The program used to be conditional acceptance to the law school, but not anymore. As long as you show up in those two-weeks, you will start school in the fall, as a part-time. During the two weeks, you probably would go over two of the 1L courses, and do some seminars and workshops that will prepare you for law school life. I don't know how much the program itself helped, but I became close friends with many of the people who also attended LEO program. Some people I know is going to transfer to a full-time program in 2L, and some will continue to stay as a part-timer.
If you have any questions about the school or the LEO program, you could ask me, and I'll try to answer as best as I can.