You might get more of a response if you include some more details, such as what sub-field you're looking at. I don't know much about the University of Pittsburgh, but there might be a few people around here who can tell you whether it's a decent place to study in a particular sub-field.
On top of that - if you consider it the best offer you have - will it make much of a difference what people here have to say? It's highly improbable that a program is so bad that someone would advise you wait another year and try again at different schools.