I haven’t! Though I am planning on being there about 2 weeks, and definitely considering adding Portugal to the adventure. Haven’t done much research, other than knowing I have friends in Braga, and Lisbon seems like somewhere I need to see eventually.
I've been in Porto & Lisbon. (My feet hurt a lot when I remember) but it was all worth it. And also the train from Lisbon to Porto is fast comfy, the windows are big, and you can enjoy the countryside, the shore in some places. Great experience.