As Scott said, read through all the threads, especially in the Rookie section. Many others have taken both courses, many never got work, some did, but others did without doing the course.
Also, there are a lot of experienced people sitting at home right now, and THEY cannot get work, with all the publicity with ROVs over the oil spill in the Gulf, loads of people are piling in to work with these whizz kid underwater robots that are just like a computer game (according to the news).
However just as many do an ROv course and then sit about unable to get work. Good luck!