Seemed an ideal solution in order to have access to my library 'on the go' without having to dock my phone to my computer every time I wanted to put different music on it. Though I wasn't expecting it to take so long: I 'only' have 300 CDs ripped to my computer but so far it's taken a whopping 18 hours, even though it managed to match 2/3rds of my library (which itself took an absolute age). It's now at 'Step 3: Uploading artwork and remaining songs", and over the past five hours it has completed "142 of 570 items". Looks like it's a great idea, but only if you have a fast internet upload speed.