I too have used the MasterPark Garage during their 3-2-1 free days program, plus online coupon. So far I've had nothing but quick service. All the places tack on port fees and such, but with the free days still made it an excellent deal. I'm not a huge fan of valet service, but the covered parking is nice.

However, once my coupons are used up, I'll go back to ShuttlePark2, or park directly at the airport with my old "Premier Corporte" frequent park card discount.