I currently teach a course that uses simulation software for some of the assignments and all of the quizzes/tests. In some ways it's good because it's hands on learning and evaluation. In other ways it's not a fair way to measure the student's learning. I have a lot of students who have software glitches with this program. If the software decides to act up, they miss the points. Also the software wants you to do things a certain way. If you don't do it that way, then it marks it wrong. I have a lot of students frustrated because they don't feel like it is a good measure of their knowledge.