I have tried CoverScout with minimal results several times over the past few years as the program evolved. In my experience, CoverScout still requires a lot of user interaction and rarely comes up with the correct album art.

On another note, the company that develops CoverScout has numerous interesting applications but they over charge for all their applications, especially considering that CoverScout & SongGenie don't work all that well. If CoverScout ever evolved into an application that did download the correct album art for missing albums I would be willing to pay $19.95 for it but never $39.95. I own a license for iSale & Stationary Pack and think both are top notch.