I can just say it is good vpn which provides free service for iranian and help them to surf the web.
There is a lot of other vpns which say we are free but they need credit card and stuff like that but this vpn is honest and trustful.
Actually I didn't try it by myself, I just now going to order it. but I hear that it is good enough and have 24 hours access.
If I were you I test it once at least.