My experience:
Didn't work while I continued to self-medicate with alcohol and other drugs.
Didn't work when I wasn't completely honest with or didn't trust the therapist.
Didn't work when I was unwilling to make the changes in behavior and attitude suggested by the therapist.
Didn't work when I wasn't clear about what I hoped to gain from therapy.
Worked really, really well when I was clean and sober, found a therapist I trusted and was willing to be honest with, made changes in my behavior and attitude, and set clear goals and attainable goals for myself.
I attempted/seriously contemplated (to the point of making a plan) suicide 18 times between my 16th and 28th birthdays. I've now been drug and alcohol free for 19 years, haven't been suicidal in 18 years, have been in a stable and happy relationship for 14 years, finished BA, MA and Ph.D. degrees, and am gainfully employed in my chosen field.
So, with the caveats listed above, I'd recommend therapy to anyone who's really sick and tired of being sick and tired. Sometimes I feel like I should go back and apologize to my old therapists for wasting their time--but I guess not, since they were paid for it.
Jankyn, just as happy as if she had good sense class