Hmm ... I didn't know that either. Anyway, I realise this is probably useless to you, as you have probably taken/are taking it right now, but never mind - might be of some use to somebody!
I had mine last Monday. It wasn't terrible ... I quite liked reading all the passages, and the questions do make you think quite a bit about the text, but it was all interesting stuff. This may not sound right, but I found it a little like a general studies exam, only more challenging - much more reading, and closer analysis of text, but that was my general impression.
I felt a little distracted by the time limit though. You know how you can normally sit in an exam and completely forget what time it is? In this one I couldn't because there was a little countdown in the corner of the screen ... very annoying! Don't really know how else to tell you about it. Essay part didn't seem too bad either - you get a whiteboard to make notes on, and there's just about enough time to write a decent answer I reckon. Just make sure you stick to the point and don't waffle (not sure whether I did, but it sounds good advice!)
We don't get our results until February, I think, so we should know our offers by the time we get them, or something. Good luck to everyone - hope we all do OK!