Wellesley professors are willing to field hysterical 11th-hour phone calls, spend hours in their offices meeting with a parade of students, and mentor their students on intensive projects. Quality and style vary inter- and intra-departmentally, but on the whole, Wellesley professors are excellent, and students are appreciative.
Professors invariably prove to be very dynamic in office hours, and a more extensive relationship is almost always there for the taking. Few students go through their Wellesley careers without forming some kind of close relationship with a professor or dean. Though some students might sometimes wish Wellesley had a few more big-name professors (it's tough being near Harvard and MIT with their celebrity profs), accessibility and dedication are more important. If you ask around and do your research, you can ensure some serious and—believe it or not—exciting learning.