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@jwdesai – CFAI notes tend to be extensive and detailed, the value add of 3rd party notes are that they are shorter/more concise, which i used as I had less time then. However, they add value most not in the notes but the practice papers or question banks that you can purchase as tons of practice is key to pass!
So yes it’s something I’d recommend, at it’s basic I think the practice papers and question banks are good investments as CFAI doesn’t have much practice papers.