I think it's pretty helpful in a sense that these people have no idea who you are, therefore cannot judge you. You don't have to worry about them spreading your secrets or anything like that. The only problem is, there are probably some people out there that come on here to do more harm than good. It can be dangerous, and that's why you have to be careful. If you are in a bad state, coming on here may not be very helpful. You never know who you'll be connected with to chat to, and that's why I prefer to be a listener.
I'm normally quite open to anyone, I'm more of a listener, and I try and get to know the person before trying to solve their situations, therefore I find it easier when people are really open, if they're kinda not willing to open up, I guess you could say.. It's harder, but usually that's not a problem :p
I find it very helpful. Venting to strangers, there are no strings attached. I have no facade (tough exterior, girl, expectation, etc) to put up. I can lay out all my problems and get advices or opinions. There are no direct consequences to the people around me or my physical reality. I have no vulnerability issue venting here as opposed to in reality.
I do find a lot of support from the strangers on this sight since most listeners seem to be open minded and this is a safe environment to vent in free of judgement due to the anonymity.
But I've found that I drown myself a bit too much with this website and it sometimes puts me in a spiral of thought that usually gets me more upset because I talk myself in circles, working myself up again. I think it fires me up again when i really should just address my problem already. But this is probably just personal to my situation...
It's an incredible concept and website altogether and I love it.