As other people have commented, it is a superb series. My one complaint is the packaging. The case is made of brittle plastic, and by the time I received the package the case was cracked and chipped off in more than one places. I need to watch all the DVDs to find out if any of them are damaged as a result. Each plastic board holds two disks back-to-back, and those center buttons that you must push to let the disk come off the board don't work very well. Every time I take a disk off the holding board, I am really afraid that I may crack the disk!