They're a little over the top liberal in many cases, but their news reporting it spot on in other areas.
You know the funny thing about this is, NPR and it's affiliates have (or did when I worked there) strived to be balanced in their coverage, within the same story they would always have a dissenting voice. And we would get complaint letters on BOTH sides, liberals accusing us of being conservative, and conservatives accusing us of Liberal bias....I've come to realize that people just hear what they want to hear. If they are looking for ANY bias, they can find it.
It was fun to read the same complaints on each side...on the same story. The news department knew they did good that way.