John Voorhees, reviewing MusicSmart 2.0 for MacStories:
MusicSmart, which is available for the iPhone, iPad, Mac, and Apple TV, is a little different than Tanaka’s other apps. Instead of casting a broad net to track the entire range of your musical tastes, the app is about digging deeper into individual songs, albums, or artists’ catalogs. But follow the threads offered by MusicSmart, and the narrow focus that sets it apart from Tanaka’s other apps will paradoxically lead to new musical discoveries and, ultimately, broaden your tastes.
I’ve been using it for a while and it works better on the more popular/mainstream stuff in my collection, but it’s a lot faster than Googling and trying to find any information on an album/song.