I pay Apple $25/yr and then my iTunes library is scanned on my PC by iTunes Match. The vast majority of my songs will match with existing songs on iTunes. Now I can download any of these songs from the cloud to my iPhone, iPad, or iPod touch at will. The fantastic news is that a digitally "upgraded" copy is supplied. The crazy thing is that the device with the horrible speaker now has the digitally upgraded song, while my PC, which is connected to some great speakers, is left with the inferior ripped copy. (I know the iOS device could be connected to good headphones or AirPlay speakers) It just doesn't make sense to me that the PC is left with the bad copy under this deal. Now maybe iTunes Match could also cloud the song to my PC but now I have two copies at the PC and I probably have to keep the ripped copy as proof of ownership or to use if I decide to not pay the $25/yr later. Watch for inflated iTunes Libraries but they are on our machines and not the machines at the NC data center. To upload all your music to Amazon or Google will take a long time as Apple stated but it will take longer to download all the digitally "upgraded" copies to your PC. I believe at the end I will like iTunes Match but I want to understand some things about it.