I would give it a 5 star's just for the Circular arpeggios lesson. There are other sweet sections on Comping on basslines and Licks on different altered chords. The approach is more to understand the instrument. I highly recommend this..I had visited this site a year earlier, today I found I could gather a lot of info from there which I missed the first time around.
So, probably it is better if you have some basics up your sleeve.