A-OK for the quality of yarn in the store. It is a cute store with a great variety of products and yarns. A very homey feel to it that should be synonymous with knitting and crochetting.
A meh- i've experienced better in regards to the customer service. I've gone in plenty of times to be ignored completely and then judged on my experience level. When I'm in Kensington and want to look at new yarn I will go in, but I don't go out of my way to visit there.