Even if it has changed, I'd recommend to anyone going there to walk it if they have the time and money. It was at least half the experience for me - walking this beautifully crafted winding path for days, past little outposts, to finally arrive at a (previously) hidden city. The view of the stars/milky way was breathtaking up there too.
True about the other, less busy, Incan ruins. Definitely worth visiting, especially the ones half buried in the undergrowth if you like that Indiana Jones vibe. If they still are, that is... :/