We (two couples, 3 kids) stayed at the shell house and had a wonderfull time - the area around Roxbury is great and the house itself is both one-of-a-kind and very comfortable. Really spectacular architecture!
We highly recommend it to others. Plattekill and Bellarye ski areas are close. 3 bedrooms and a loft so lots of room but sound does travel in the house. House was very well equipped in terms of kitchen, baths, linens etc. Very good views out on the mountain and easy to navigate in the snow.