I haven't read the books but I have gone through his valuation course on youtube.
I may not use 100% of the tools and ideas he presents, but I most certainly use 100% of the context to think of things.
He taught me many things that would otherwise remained unknowns blackholes that I wouldn't consider when valuing businesses.
As per the comments above me - does learning from practitioner better? Probably.
Is it practical? Probably not.
Aswath collected, organized, edited, teached - then reteached, and then optimized for teaching, for years.
10 hours spent with Aswath content, that is so dense and optimized, is like 1,000 hours reading investors letters.
I did both - learning from Aswath AND reading thousands of pages of investor letter.