I am pretty frugal when it comes to most things but airport parking is not one of them. After a day of traveling, waiting in lines at ticket counters, bag drops, airport security, transport from accommodations, transport from rental car drops, etc., the last thing I want to do is wait for a shuttle to offsite parking and then wait for them to get my car once I finally make it back to Seattle. I park at the airport. If I am traveling busy weeks, I will even pony up for reserved airport parking. I have another 1.5 hour drive to my house once I hit the airport (or 1 hour plus another wait for the ferry). I want to get to my car asap and go. Worth every cent to me. In the past though, I’ve used Wally Park and they were fine. If I lived closer, I’d Uber.