iTunes Match has been the biggest headache for me since it first came out. I've tried it out twice, but have been disappointed each time. Problem is, I don't want my already-stored songs touched. I wanted them to stay, with the ability to add songs as I chose. Not possible with iTunes Match. It gives you duplicates, destroys your playlists, & destroys your album art. And if you want to go back by disabling it? I have pity for you. Since it destroys your playlists (on both your Mac and your iPhone), syncing your old music back onto your iOS device is very painful.
That said, Google Play Music has been a godsend. It is wonderful. I easily matched all the music in my library (about 10k songs) in just a couple hours, something that iTunes Match took multiple days to do. Next, it's a stand alone app, so it doesn't mess with the music already in my music app. If I ever have a problem with it, something I don't anticipate, I delete it. Gone, without any bad residues. And lastly, it's completely free. Apple makes you pay, not only in frustration, but in cash to enjoy the misery that is iTunes Match.