Several wonderful things stand out about this great place. First, the kitchen is fantastic - can easily have 4 working on meal prep at the same time with many more standing around chatting and snacking. The dining table adjacent the kitchen in the sun room is a great space to eat and chat late into the night with views of the water. We also enjoyed the fire pit and gathered there. The house is extremely well appointed. We used the outdoor grill for a few meals, and it was very generous to be able to use the canoe's, kayak, and paddle board.
The lake is smaller so you'll want to be boating with small boats like the canoe and kayak, or a pontoon boat perhaps. It's also shallow which means that it's quite warm. Swimming is great from the designated swim area about a mile from the house. Access to the lake is easy across the street, and is a perfect spot to launch the canoe(s), but too weedy for swimming outside the designated swim area.
The location is ideal for quick trips to a wide variety of Berkshire area activities -- Tanglewood, Norman Rockwell Museum, waterfalls, a list too long to list here, but your hosts have made a very well-considered list to review.
The local store and farm stand are not to be missed with fresh baked Amish bread from the store and fantastic fruits and vegetables from the farm stand. For a more suburban-style full service grocery you'll need to go 15 minutes down the road.
The hosts were excellent, and extremely organized with a well-laid out booklet describing where things were, how to use the very nice Sonos sound system, wifi details, plus details of local shops, activities, and restaurants.
Our group was 8 adults and the space was plenty big for us. If your group is larger than that you'll want to get a floor plan to see how to match everyone up with the right arrangements and keep in mind that it's 2 1/2 bathrooms. The bathrooms are recently remodeled, large, and very accommodating, but if you had the maximum number of guests the home can support it would become a bit of a bottleneck -- other than that you could easily have a group double our size with all the space available to sleep and gather.