I would use rate my professor to make sure that I didn't end up with an over-the-top difficult general class that I didn't really care about but needed to fulfi

I would use rate my professor to make sure that I didn't end up with an over-the-top difficult general class that I didn't really care about but needed to fulfill a requirement (Art history, public speaking, etc). That way I could optimize my study time to focus on in-major classes.