It was quite good fun, but a rip off really. I agree with the above poster - go and get some work experience and buy a good book, like the insider's guide to medical school or something similar. It does give you a taster of what uni life will be like, and will help you make up your mind if you're unsure about medicine - many people changed their minds COMPLETELY after Medlink. The interview session was rubbish - you had to give whoever was on your right a fake interview, then they'd do the same to you. My friend and I just laughed through it all, and it was no help whatsoever.
But it was FUN!