The reporting on the updated version of ECT treatment for depression in Wired looks credible and sheds light on this sometime helpful treatment today.
Wired says, "Shock treatment for depression is making a comeback, and it no longer resembles a scene from One Flew Over the Cuckoo's Nest. Electroshock therapy, or ECT (the acronym stands for electroconvulsive therapy) has been used to treat severe depression for decades, but the serious side effects of the procedure, including short- and long-term memory loss, have long relegated it to last-resort status."
Wired quotes one expert as saying, "From the patient's point of view, TMS is really attractive. You're awake, you're conscious, and you feel in control. Instead of having a shock go through you, you're only stimulating the parts of the brain that need it."