I have bought the bronze level american smooth tango and the bronze level american rhythm swing, and mambo tapes. I found them quite helpful, they are a great reference for those who dont have time for classes (although classes are of course much better). I havent retained all the moves, some or more interesting than others, but thats natural I quess. The CDs allow you to easily jump from move to move, the instruction I find detailed enough without being too slow.