I just purchased the tobii – and I would recommend that you set it up to limit the WIDTH of the calibration. I am a gamer, and am looking to review this product (I purchased it myself).
Currently, I run 5760×1080 – and I cannot really look over to the right and left during calibration without moving my head. Which then causes the calibration to “loose” my eyes.
I would recommend that you setup your calibration to look to setup a 1920×1080 calibration or 1440×900 depending on the system.