We've tested the YCF concept and product with over 500 potential users over three years via quantitative surveys, qualitative focus groups, one-on-one usability studies and live scrimmages.  The reaction has been extremely enthusiastic and specific learnings have driven the product's evolution.  

“This is a full, immersive, interactive football experience that transcends the current football game or fantasy football.”
— 25 year old male fan
I get bored with “real” football because I’m not connected with the game...I want to play YCF so I can participate with others and beat them.
— 22 year old casual female fan
The idea of direct influence, of seeing your play come to fruition would be huge.
— 23 year old male fan
It’s a great idea because it takes the fan to another level.

— 18 year old male, avid fan