Nothing more than a mindf*ck... It just makes the system think you depress the accelerator more than you actually do, so nothing else happens to the engine mappings, HP's or anything else. Try to find something like "sprintbooster" on the big web, that might explain something.
Full throttle cannot be exceeded, so if you put the pedal to the metal in sports mode there won't be any difference with or without the module. If you look at the installation you will see the module is chained between the fly by wire pedal sensor and wiring harness to the ECU. That way it can and will transmit the recalculated values.
Why i know this all? Up until a few years ago i wrote my own engine mappings for my SAAB 9-5 Aere HOT, so i do know what it takes to gain HP's and torque...
Don't waste your money on that; IMHO it's just a gadget for the less gifted.