It's a great idea (originally pioneered years ago by the ever-so-ugly "iEatBrainz") which I have a need for, and the program seems to be beautifully, elegantly, professionally, and thoughtfully executed. My music library at the moment has 8,600 songs, about 500-1,000 of which need better tags. My tastes run to the fairly obscure, and I don't expect any program like this to successfully find them all, but after only three test songs, all of which provided wrong and/or redundant info, the demo stopped searching and instead popped up its $29.99 nagware screen each time I tried. I'm sorry, but three tests is just not enough to tell me whether the program will be useful to me or not. If I were flush with cash I'd fork up the money just to find out, but not at the moment.