How is public transit from Sumner Washington to Seattle?

I am going to be doing a summer internship with Amazon in Sumner. I wanted to know how convenient the public transit is from Sumner to Seattle and back. Do the lines run late at night and on the weekends, is it a bus line or rail? How long is the trip?How is public transit from Sumner Washington to Seattle?
Direct service on Sounder commuter rail on weekdays and also on ST express bus #578How is public transit from Sumner Washington to Seattle?
Ooooh, that's a lonnnng ride! You're damn near in Puyallup. Catch a train if possible. That's easily a 3 hr bus ride.