GingerGM's London Course vs Eric Rosen's London Course

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Avatar of vish2010

Hello, I am interested to learn the London System through a course. I found two of the same from my favorite creators, Simon Williams and Eric Rosen and I would like to have some suggestions on which course is better for whom. how and why. Thanks!

Links to the courses:

Simon's course: https://shop.chessbase.com/en/products/williams_the_london_system_reloaded

Eric's Course:

https://www.ichess.net/sale/8020-tactics-london-system-im-eric-rosen-offer/

Avatar of felonet
Hans Neimann course on chessable (free)
Avatar of jjupiter6

Warned about what? Are they some kind of scam?

Avatar of ESP-918

Best  FULL, FREE course by 2600 + GM on London 

https://youtu.be/TXBbmt7XneA

Avatar of vish2010

Thanks for the replies!