So far it’s pretty bad about disability when it’s used for random joking purposes. And if you count fat-shaming it’s awful. However, it's not too bad when it very occasional deals with disability head-on. Remember the one where Sherilyn Fenn played an amputee dating Chandler?
It wasn’t exactly groundbreaking, but I like how she confronts Chandler, asking him flat out if her prosthetic botheres him, “Because I don’t like wasting my time”.