Like [MENTION=1669]Gist[/MENTION] mentioned, I think every type can benefit from therapy. It really depends on an individual's personality aside from the stereotypical concepts which MBTI gives. There are a lot of things at play here, but I don't think someone's MBTI type is one of them.
Some people come out of therapy thinking it's amazing, others hate it. That has a lot to do with the therapist. Some therapists are simply not good and/or are in the profession just for the money. Other therapists aren't bad but may not be right for everyone. Also, sometimes people refuse to change or listen to the advice of their therapist. It's the therapist's job to help them (or rather to give them the proper "tools" to help themselves whilst being a support system for their endeavors), but they can only do so much.