Yes I have been to this site.  Paula does a great job of really breaking down the videos so you know what your getting.  You can also email her with specific questions.  I had some about MIS before I discovered this site and she was very helpful.
One caveat of this site, I have found that while Paula always gives Cathe at least 4 of 5 stars, she usually faults Cathe for not having one of her crew do the workout at a lower impact/intensity level.  While Paula has a point about this helping beginers and lower intermediates, Cathe targets the advanced exerciser.   While I sometimes wouldn't mind seeing someone else working at a lower impact on my lower energy days so I'd have someone to "workout" with, I don't fault Cathe for not doing this, since I'm actually more motivated by wanting to keep up with everyone else.
Dawn W