I bought a relaxation compilation CD a while ago at a car boot sale. I found that my favorite tracks on the compilation were all included in this boxset, so I bought it, and have been very impressed. I've had it for a year now and I listen to it very often (apart from the sound of nature CD which is literally just sound of nature, but still nice). Each CD has a different theme to it. Celtic, Eastern, electronic and nature. They are all wonderfully put together with nice tuneful tracks that really draw you into a relaxing trance. Try spotify to give a few tracks a chance.