I've ordered from the online site, and I will say that I was very impressed with the speed of service.
What is nice is that they have kits that go along with the Mason Dixon books too. They have different sizes of skeins too...such as the large cones. I made a rug from the MD book, and I ordered three of the cones from the internet. They were delivered very quickly, and before too long, I had my rug!