<p>The main benefit is an earlier registration (more units = earlier) time so you’ll have a better chance of getting the sections/times you prefer before they fill up. Also, by receiving AP credits you have less elective units to fulfill the total unit requirement of 128 to graduate (doesn’t really apply so much to you in Viterbi but depends on individual/major/etc) and as a result of less elective units to fulfill, you have the possibility of graduating earlier.</p>