MarketPress Coupon - Max Uses.

Hi Gurus,

Its unclear to me what the following coupon field means.
Max Uses
Enter the maximum number of times this coupon can be used.

Does this mean per person, or total number of times the coupon can be used by everyone?

I want to be able to control both. I don't want a customer to use the coupon more than once, and I'd like to control the total number of times that a given coupon can be redeemed.

How is this field operating?