Thinking the 100 tracks this four volume set has to offer would be a relaxing in the car, or underscored during work time, I found the compilation of various composers to be rather jarring. Each CD contains 25 tracks of different movements from 6 to 8 artists, which don't follow any pleasing through line. If you are interested in learning just who composed which famous piece, or if you need to have on hand the top 100 classical pieces (according to whom? I don't know), then this may be right for you. If you are looking for leisure then I suggest you find something that actually completes a symphony.