I've had mine off for probably 18 months, well over 10,000 miles, I've gotten real used to it. I might have to stick the weight back on to finally see the difference.
2004 SVT Focus
Custom front-bumper-mount bug guts; precision sprayed brake dust on OEM rims; 15% Pine Tree pollen over the clear coat.
No more SVT autocross, I drive the thing in the avatar.