It definitely helps with our abandonment fears. When we tend to feel like we're going to be left, she says "But, we signed a contract, I'm not going to just up and leave you. And I haven't ever lied to you before."
It helps with self harming because it has instructions to follow to try to make the urge leave. The instructions seem to help us all focus and feel more safe because there are set steps to do. Our T is very quick to return phone calls or emails and helps the urge always leave.
So far, it's been a savior.