Thanks for the question and I'm sorry it took this long to get to it.

As a senior, getting into courses really isn't all that difficult. The way our course registration works is by rank. It goes Senior, Junior, Sophomore, Freshman. Seniors go first and have the best chance of getting into courses.

I've only heard of a few seniors having problems getting their courses. This usually amounts in popular courses that seniors might need in order to graduate (if you plan it out right it shouldn't be a problem. Also there are plenty of courses to choose from). This could also amount to a senior not understanding what they need to graduate. If you plan it all accordingly, you shouldn't have problems getting into courses and if you use your advisor properly, they should help you keep on track.

I guess that's about it. If you have further questions, don't hesitate to send them my way. With that, have a good one!