In my experience, you can be on hold for a while depending on how busy they are when you call. I don't use them too often because of that, but I've gotten through a couple times and they were quite nice. They usually just let me vent for a bit and then we end up having a chat until I've calmed down enough to hang up. From what I've read, it can be a bit of a mixed bag, but if you do end up getting a bit of a dickhead on the other end you can always just hang up and try another place. Most of the workers just want to help. It's worth a try, they're good for when you just need someone to speak to.
Warning: they can potentially call the police on you if you say you're suicidal with active plans to end your life. Anything else they'll keep confidential, but if they think you or someone else is at risk of serious harm they usually escalate things. It's usually safe, just don't go saying things like 'I have a bottle of pills right next to me and I'm going to down them right now no matter what you say' lmao.