In my experience crisis lines were a total fail. I couldn't even get through on one of them.

The local one wanted me to go to the emergency facility to talk to someone so I headed down. They didn't have a record of me calling so I had to wait. My depression is such that once I drop low enough, stuff just starts to happen without conscious thought. Luckily, the counselor came and got me as I was walking out to the truck because I had something in there that I could harm myself with.

With both incidents though, once the information got to my therapist I was basically on my way to an involuntary 24 hour observation period, but I managed to talk them out of fully committing me both times.