i have used tir 3 for a few months now and cant be more happy, well i guess with the 6 dof i can be:) for those who complain of motion sickness, well thats more realistic! im a bit of an immersion freak, but i have found i have improved greatly with it, SA just isnt an issue anymore like it was with the hat, i can concentrate completely on acm, and thats a good thing! I hear 6 dof is easier to learn and feels more natural, so for those of you that havent jumped on the wagon, it seems like its a good time to do so!