I disagree. You can never stop learning. My father taught me to read every manual and it has served me well. There is always something in there that pokes out that you didn't know.I don't have a habit of going through the manuals basically and frankly I'm least interested in doing it. Unless I had negligible knowledge of it, I never think of manuals. I say spending hours to read what you already know is not at all a smart thing because you will surely have minimum knowledge of what you had bought and that is what written in the manual. If you otherwise have any problem with it, then asking the one who knew about it is the wise thing than getting it clarified using a manual.