That middle bar position is probably the worst position I've seen out of all the seats. I may be going out on a limb here, but a lot of people who play games (read: a lot, not all) aren't the most flexible of people, myself included. Having that middle bar there forces you to either
a) Stand up and then lift your legs over it
or
b) Bring your knees to your chest and rotate to leave the chair
Unless it folds down or something, in which case it's even more of a hassle, because you'll have to step over your wheel. I'll stick to my Evolution.