I know how it works. I had it for a year.

Match should be a service that works with your collection to augment it, not an either/or selection. And the other problem with Match is that it offers very little compared to services like Spotify. It's a half basked solution.

If i want online access to my personal music, there are many cloud based options for that. Many of these are free. If I want a way to experience new music (along with my own), and have the capability to stream OR play locally, then Spotify makes more sense than Match.