An *unpublished* study found it helped college students prepping for the LSAT:
http://www.nytimes.com/2012/04/22/magazine/can-you-make-yourself-smarter.html?pagewanted=all&_r=0
I would recommend getting the Logic Games Bible as a supplement to 7Sage. It's a really good book for $30 on Amazon. I give it most of the credit for getting -0 to -3 on the games.