It looks decent to me. The audio is done by native Koreans, so you're safe in that regard. I guess the usefulness depends on who's using it and what they're looking to get out of it, but it seems to me to be a pretty good resource for practicing pronunciation.
Ok, thanks, Alex
Do you think this site is any use? - it is a link off of the link you gave:
I've never really spent much time on studying pronunciation, as I guess it just came more naturally to me. I found this through a quick Google search though and it might have some useful resources for you: http://learnkorean.ning.com/forum/topics/pronunciation-practice
bump. Anyone have any tips?