You'll get less body-roll on turns. I have a friend with an EJ8 and he goes like 55 on a semicircular on-ramp with hardly any body roll, even without a rear sway bar.
Turning in fast turns is a lot easier. You dont feel the weight of the car shift as much(b/c it doesnt) thus requiring less power on the motor when ur cars not rocking back n forth after turning.
i def wanted to start working my suspension and brakes before i golt into performance upgrades.