Have any of you experienced or know someone who has experienced electroconvulsive therapy?

I've read a lot about ECT, or electroshock therapy, and it seems there's an equal balance on the positive and negative factors. I realize that it's basically like having a grand mal seizure, except you're asleep while it happens. I'd like to hear stories from anyone who has directly or indirectly experienced the effects of electroconvulsive therapy and its short and long-term efficiency in treating severe depression. Thanks in advance