Somewhere on this site I did a little writeup on the scuba course. In a nutshell, it isn't a full certification, it is a junior certification. You will still have to dive with a dive master or instructor. This doesn't appear to be much better than a resort course, but is much more expensive. The best I can tell is that it allows you not to take the instruction the next time you go out, but you can't dive with a master diver or instructor with you.
I've just decided to take a resort course through Cozumel Sports. Email me offline if you want specifically who I'm working with.