My extended family and I stayed at Brittany's house as part of a pre-Christmas getaway trip to Yosemite, and we had a fantastic time!
The fundamentals are 10/10. The house is extremely clean, the beds are comfortable (especially the tempurpedic cal king), the kitchen is well appointed, and most importantly, the owner is extremely responsive and friendly. We had a minor issue with the heater not getting hot enough on our first night and Brittany responded immediately. She took our concerns to heart and had a repair person on-site within hours. She went out of her way to ensure we enjoyed our stay and we slept comfortably for the remainder of our trip.
In addition to the solid fundamentals, there are a ton of extras that make this house a great place to vacation. The kids enjoyed the toys, TV + Roku box, and books in the living room while the adults had a blast shooting pool and playing board games downstairs. Downtown Groveland offers a grocery store, restaurants, and shopping just a few minutes away while the entrance to Yosemite is just a half hour drive.
Give Brittany's place a try, I'm confident you'll have a great time!