Hello FastBackwards,
I have taken a look at this and have read the excerpts from their books. I will read 'Entities, Parasites of the Body of Energy' in the Spanish translation online there at the site since it is the whole book. That will give me a broader basis to form an opinion.
I don't have a negative impression of the site and I think that if there is something there that interest you, you should pursue it if you are able. One thing I would say, is that I do not think it is a good idea to focus exclusively on one chakra. This is a system and has to be developed holistically. Certainly I use some more than others and some are naturally in different states than others. But, they also support each other and it is helpful to have a practice that tries to develop all equally. I didn't see that there.
Also, even if you adopt their techniques, don't make them your sole source of information. An example of this is that some of what he wrote about Karma is dramatically simplified.
Interview with Sagan:
https://www.youtube.com/watch?v=CvwMBcbL9SI