I've lived in several US cities of comparable size...

I've lived in several US cities of comparable size and this is the only metropolitan library I've ever frequented that has hours similar to that of a library you would find in a small Alabama town. Closed on Sunday? What kind of library closes on Sunday? And open to only 6:00pm on a Friday night? These are the hours of a library for a town of 30,000 people, not a booming metropolis of 620,000 + people.

Other than that, the OKC metro library system as a whole is very good.