As seen from the comments above, this is not for everyone. I actually love it - great concept, good execution. Clearly, one has had the ability to preview midi files on a computer since when - 1987? This implementation, however, is so much more than that. This is a great companion to a sample manager, and also includes other utilities.
Sarine is right - this product is symptomatic of capitalism - innovation is encouraged, and products and companies rise or fall on their quality. (I love capitalism. )