My T uses attachment as a way to develop trust and closeness in clients - not specifically using attachment therapy, if there's a difference. For me, it's been amazingly helpful, though not easy. I have a personality disorder w/avoidant features. These avoidant features are what I want to change. My T asked several times early in if I was comfortable being isolated or socially limited. I said no, I wanted to develop close relationships, but didn't know how. T told me that his therapy style would be different if I was happy being just as I am; it was perfectly valid if I didn't want to change my life style. If my T hadn't encouraged the development of attachment, I would have wasted the past year. I agree w/many people that it takes a strong T to carry attachment therapy or therapy using attachment off successfully. The T must be available to the client nearly constantly, allowing emails, texts, calls, and be able to tolerate the dependency that the client develops. Perhaps the "failed" or unsuccessful/harmful results of attachment therapy has more to do with the therapist than the therapy itself; I don't know what you've read. I'm pretty sure all types of therapy have been discredited or pronounced as harmful at some point.

I don't know what warnings or disclaimers might be helpful to clients thinking of going through this type of therapy. If the T specifically advertises they use attachment therapy, they should indicate that the client might feel uncomfortable in a close relationship, or a relationship in which the client may need to depend upon the therapist and the therapist's judgement; there may be intense feelings of neediness, which will be addressed in sessions. Hopefully, the client will have read something about attachment therapy prior to jumping into the deep end. I knew nothing about attachment, but using attachment in my therapy has not been harmful or bogus...IMO.