Do note though that fitting a booster will not help in regards to munching down brake and accelerator. In my experience although the booster relieves pedal effort, I believe the pedal will in fact go down further (just get into a boosted car, hold the brake pedal down and start the motor and you'll see what I mean).
In my opinion it is true that boosters are only really a benefit for driving round car parks etc. I run unboosted and the brakes are just as good (if not better) braking from high speeds, but braking at low speeds (30mph for example) can be quite hard. I almost rammed my Mini up the arse of an Integra the other day so i can testify to this
As to better brake response, at low speeds it will stop much easier as I said, but you will to an extent lose the feedback through the pedal so it is harder to stop them from locking.
Remember that in emergency braking, the booster will make absolutely no difference, as you will no doubt be pushing the brakes through the floor no matter what!
If your brakes work at the moment, is it really worth the money and effort?
Anto.