I am currently taking it, and it is pretty enjoyable, as courses go.
I think it is only one exam, yea, and the course has changed this year. You now do a dedicated unit on laptop hardware, and there is a few other changes. We do one seesion a week, and I think I am taking the exam in the summer. Seems easy enough though, looking at practice questions. Half of them require PC knowledge, and the other half seems to be common sense sort of thing really.