I have an s14 with ABS and 4 piston AP Racing calipers with stock master cylinder and it works perfectly. I would take ABS over non ABS any day if it's working properly. For drifting I don't know, but for road racing its great.
You are supposed to threshold brake, if you have ABS it'll signal to you that you have gone passed that threshold. If you did not have ABS there would be no signs of tires locking up except tires screeching and smoking but by then it could already be too late and you could have flat spotted your tires already.
ABS IS AWESOME DON'T TAKE IT OUT UNLESS ITS NOT WORKING RIGHT
