Having studied the modern Schulze and read bit of material I could find by him I felt I had a pretty strong start! WOW though in finishing the SYL was incredible. There were exact formula, direct dosages, expounded explanations and procedures along with detailed information on almost all major diseases. Such a powerful tool for anyone interested in Natural Healing!
In regards to updates, while I don't know much about SB. I'm fairly certain he has no clinical experience and throughout the SYL edition I was reading I found various places where he directly contradicted Schulze's teachings, which made me a little uncomfortable. I can only imagine that further "updates/editions" would be filled with more of these contradictions, and thus I'm a little leery.