This is one of, if not the best bakery in Seattle. Everything here is just good, from the macaroons, to the pizzas, to the croissants and pastries. In my time going there, I think I've had a grand total of one thing that I didn't like.
As for the "trek", if you are visiting and you are downtown all you need to do is hop on the "C" rapid ride to West Seattle. Get off at The Junction and you are within a block of this place. It takes 20-40 minutes, depending on traffic.