Peruvian Highland Wool Feedback

I was reading another blog somewhere (was it the Mariah KAL? don't remember), in which someone said their friend knitted a Rogue out of Elann's Peruvian Highland Wool and the thing pilled on the first wearing.

I would love to hear what the rest of you have experienced with this yarn. Not only am I hip deep in my first Ribby Cardi, but I just bought enough more to make another RC and a Mariah.

Any feedback yet?