Does anyone have any feedback on a Nordstrom Signature sweater like this one? It's 50% cashmere/50% cotton. Is it better to get 100% cashmere, or 100% cotton? Is it likely to pill? It would be for a gift, but I'm not used to buying cashmere or cashmere blends, so could use some advice. I don't want to get it for her if it's not likely to be good quality. TIA.