I helped in the creation Link hidden: Login to view. And I personally think its an awesome site. The information contained within the site is very valuable and the site is set out very well.
I think the only problem you will have is soaking in all the knowledge that is contained within the courses and the site itself. We have had many reviews done on the site before it was officially released to the public and the reviews were all high. Most stating that skyhighauctions had more information inside the site then similar sites selling information like this for 3 times the cost. This is the largest undertaking we have ever taken and the creation of this website cost a fortune.
I have a strong feeling that everyone including experienced powersellers will learn many very powerful techniques within this site. I actually learned a bit while creating the audio guides alone.