Hi Ralph,
Good point about the bass line, and thanks for a good example.
Another "sticking point" for some pieces is the whole modal thing. This isn't such a big deal if you're just figuring out chord changes, which is what the main point of the pdf download is about. However, for those who want to put those chord changes into a sheet music format with the correct key signature, modes can often be confusing. Learning to play a whistle (as in Irish) was one of the best things for me in learning about modes, and it's fun, too
But I can't tell you how many people I've had ask me why the software wasn't putting in the right key signature for a song; for example when the root note of the first chord was an E but the key signature showed G (1 #) rather than E (4 #s). The piece was in Em, which is the minor of G
Thanks!
Sherry