One friend of mine took the course and uses what he learned to trade "reits"
Another friend of mine uses their service for daily UVA,POC,LVA, 5,20 day overlays and Liquidity Data Bank(commercial activity)
I have bought back-data from them for research purposes
If you are just getting in to Market Profile, from what I hear it is well worth the $500
Once you get all the terminologies down it easy and POWERFUL