I rung up 3 times altogether. Once for religion and twice for english. The first english and the religion were both great, with them helping me extensively. For english, the discussion lasted 3/4 of an hour. The second english phone call, they put me through to someone who hadn't studied that particular text, but were still able to help eventually. So, it was very helpful, an invaluable resource. You get to hear professional information that may be from a different perspective than your teachers, which can help. In other words, a wonderful, free, tutor.
Good work advice line.