While I didn't do the rafting (it just didn't appeal to me personally - I'm not a terrific swimmer) virtually everyone that I know that did it thought it was great. The website notes that you should be a good swimmer. Others that have done the journey may be able to more accurately comment on how critical this really is. But if you are good swimmers, I would def advise going for it. Like I said, I have not heard a single negative review.