I love the colors which go well with my living area, but I am noticing white threads coming up among the black.  I would have thought the coloring process was permanent throughout the rug.  I've used a black marker to temporarily hide the white thread(s) but I didn't think this would happen.  When I vacuum I am cautious to watch out for removing any loose ones. 
This is holding up very well since I first wrote the review, I am pleased with this purchase.