I used then only one time, didn’t have time to read the whole book in college. Felt guilty, but still made an A.
Our literature teacher actually encouraged us to use them. She kept multiple copies to share — . Felt knowing the premise of multiple books was more important then reading just a few. In one semester we covered close to a hundred books. Would never have had time to read them all. Were able to compare and contrast in much better detail. Just wish I had bought copies of the cliff notes for all those books.