Well I can't say it's a terrible idea, I mean I wouldn't buy it, but then as a Canadian living in Japan, and buying off the Japan iTunes store, there are a few apps I hardly see the value in, but that obviously the Japanese do (they're in the top fifty apps at times), but obviously they do well.
Different strokes for different folks I guess.
Anyways, despite my not being interested, the screenshots do look great. Best of luck to the developer!