I've used the text line several times. They take forever to link you with someone and then their responses are slow and usually just scripted.
Usually it would go like this:
"I'm having a crisis about XYZ"
"I'm sorry to hear that. That sounds so hard. Tell me more"
"blah blah blah"
"That sounds very difficult. May I ask, do you have any thoughts of hurting yourself"
"Yes but I don't plan on acting on it" (always a lie but I don't want to get the cops sent on me)
"I'm glad to hear you don't plan on acting on it. What are some coping skills you like?"
They then tell you to try some menial coping skill that never once has helped me in a suicidal crisis. My favorites were eat a brownie, paint, and go on a walk at midnight as a young female. Then they hang up.
I've only had one experience with a crisis like be helpful and it was because I was having a panic attack, I wasn't even suicidal.