This really works. I have a little over 10,000 songs in my iTunes library, of which about 20% are MP3 files that friends or my kids have given
me. Sounds great, but small problem: no album artwork, sometimes no song names, resulting in a crappy way to keep my music organized.
TuneUp really works. You can download it and it gives you your first 100 albums free. For a one time fee of $29.95, you get unlimited access to their database and it automatically updates your files when you open iTunes. What a delight to find my entire Grateful Dead collection with all the cool album artwork. Yes… it really works. Highly recommended.