I think it is fair to say that I went in with a lot of assumptions and thus didn't realize ACKS did things differently until it came up. Reading the thing cover to cover might've helped.
That said, the book does have some severe ergonomics issues where nothing is ever technically in the WRONG place, but it does seem like it takes me more guesses than with other systems to find what I'm looking for. That said, I think Alex knows and feels bad about it, so we try not to mention it too much.