I'm considering paying for Hertz Platinum in 2015. The only thing actually holding me back from committing is that most of my rentals are at SEATAC. It's a pretty efficient system there for an off-airport rental center. Does anyone have experience with Platinum service at SEATAC? How reliably do they pick you up (and where do they do so? Door 5?) and how easy is the returning-the-car experience there? Thanks!