First and foremost the place is so private and beautiful that it will take your breath away. If privacy & views are what you are looking for you simply can't go wrong.
It is a cottage in the woods - literally, so don't think that it's a pristine 5 star hotel. Beautiful mountain views, woods all around, and and some hiking trails behind the cottage. The place is cozy, cool furnishings (really, there are such cool little things everywhere throughout), comfy bed in the MB, and the bathroom/shower are fine.
In retrospect, for our own comfort, we'd perhaps have brought an extra bath towel or two, some firewood (plenty around but it was a bit damp for foraging), and made sure the heating system was turned on (if your trip is in the fall/winter months). The kitchen has plenty of cooking implements; bring any special spices/oils you need if you plan on cooking a lot. We cooked breakfast, but the property is close to all the Berkshires has to offer for other meals.
Really couldn't have asked for a nicer spot - sincere thanks to the host!