I signed up for iTunes Match on the first day and completed the process in a few hours. I signed up for Google Music on Friday and just finished (Monday night) uploading 3661 songs. I love and will use both services. iTunes Match has the advantage of full integration with Apple products and the ability to match files from your library with professionally encoded 256 kbps files. It is also cheap at just over $2.00 per month. The major disadvantage is it doesn't stream to computer browsers and IOS devices. Google Music has the advantage of being able to stream your music to almost any computer or smartphone with no downloading and it uses a small cache. It will sync from iTunes including playlists. Finally, it is free. There are two disadvantages. First no IOS app. However, using Safari works well. Just keep one tab or page open for the website. Second you must upload every music file. At 1 mbps up it takes about a minute a song. Thus my 3661 song library took 60 hours! However, this is a one time only issue. Once it is done, it is done. So to me it is a small disadvantage. I plan to use both. Two great services for $25.00 a year. 1. I will use iTunes Match to keep my four computers (3 Mac and 1 PC) in sync and to download songs that I play often to my IOS devices. 2. I will use Google music on the computer at work (iTunes not installed) and to stream music I play rarely to my IOS devices. The best of both worlds. A final comment. I believe iTunes Match is a must have for all music lovers who are Apple centric. Google Music is a must have for all music lovers with a computer and/or smartphone. Thus Google Music has great appeal.