First of all Adele 21,as a piece of Music is a great, Turning tables, Set fire to the rain are just brilliant, and the Cure cover Lovesong also fantastic. So why the three stars. Well first of all Adele 21 is a five star album, however the compression on this CD is unbearable,it has at times is so harsh it has distorted the music.This appears to be because the transfer being so loud you loose the quality of the recording. I was so disappointed with the sound I bought the vinyl version hopping it would be better, it is not leaps and bounds but it is of a higher quality than the CD. I can only believe the CD has been mastered from an MP3 file, hence the loss of quality. I appear not be the only one who felt this i looked on line and it appears to be many people upset by this transfer. I personally do not understand why this is being done, why can't the record companies just let the quality of the recording come through. If you want to know what I mean put the CD in a reasonably good system and turn it up, you will not be able to go to loud before the sound begins to distort and clip,if this is the future we are going backwards, there are many recording 50 years older than this that sound 100% better. This is a shame that one of the best albums this decade has been mastered so badly I do hope XL recording take note and solve this problem. Those thinking of buying the vinyl version don't bother it sounds the same as the CD. This review is based on the very poor quality of the CD so please make sure you understand it not for the album musically. Shoot the mixer!