The training can be very rewarding and fun. You'll learn better decision-making skills, time management, organization, and people skills. There are also significant scholarship opportunities. Amounts at other schools may vary. The course starts out slow and gradually builds over time.
Most cadets find it challenging but manageable.
The course earns you one credit per semester and it meets the Uof S requirement for Physical Education. Most degree programs require two Phys Ed credits. You can have this requirement satisfied with only two semesters of Army PT, instead of four semesters of other university Phys Ed courses. This is a common misconception. What if I join ROTC and later realize that I don't like it.