Please be aware that there are major pronounciation differences between British English and American English; this volume is intented for people studying American English (where both "car" and "clock" are pronounced with the same short "a" sound as in "father"). I use it with my Japanese student and so far it's been helpful. There are 60 lessons at about one minute each. My only complaint is that when you burn it to a CD it randomly creates 10 tracks at about 7 minutes each. This makes it difficult to navigate and often the tracks break within a single lesson.