My husband, 2 boys, and myself had an amazing family vacation at the cottage. We swam, fished, had fires (with smores obviously), played games, paddle boarded, and generally just enjoyed sitting in the Adirondack chairs which were very comfortable on the deck over the lake anytime of the day. We also explored some of the area's wineries with favorites being Weiss and Barnstormer, went hiking at Watkin's Glen gorge and Taughannock Falls, and enjoyed too many breweries to name!
The cottage itself was very clean and had a well outfitted kitchen. It was very open and airy with great views of the lake. Wasn't a big deal for us, but you do need to bring your own sheets/towels and drinking water (water itself is fine for showering etc, just has sulphur taste/smell that you don't want to consume much of). Joy communicated with us very well even before our stay answering all our questions and during out stay gave us some great recommendations.
I have three recommendations for future guests. The first is that there is a Dollar General store just down the road that is very convenient for forgotten items, food, etc (or bribes for your kids when you take them to wineries all day). The second is to hit up the Waneta Lake Boathouse restaurant. They don't have a sign on the road, but food (pizza especially), drinks, atmosphere, and service was great although check their hours ahead of time. The third is that firewood is easy to get at any number of near roadside stands ($3-5 per bundle).