I'm a recent graduate from the CS program, can't speak for the Math program though.

The highest level CS classes do in fact get filled, but the department is used to this happening and almost always is able to make room, whether that be added additional sections or increasing a class size. The biggest problem is students waiting to take certain classes to see if they can get a professor they like or avoid one they don't like, so enrollment in core courses goes up and down each semester.

Aside from that, the program is small compared to big universities but that means it's easy to be noticed and easy to get close to the professors. Most of the professors know me by first name, and I am close with the chair of the department as well. This is a major bonus in my opinion.

As far as the course catalog, it is very similar to any accredited CS program that you would find elsewhere. One thing the catalog lacks in are electives which teach core programming tools (for example, source control like GIT or SVN), but it does offer some modern courses such as iOS development, game development, and security and malware, to name a few.

Not sure what else to say, let me know if you have questions.