We loved our stay in Keystone. The house was centrally located to everything we wanted to do and 5 minutes from Mt Rushmore. You really can see Mt Rushmore form the house, which was pretty cool, especially for my (obsessed) 5 year old!
The house was also very clean and they provided just about everything. They provided, or previous renters left - shower products, laundry detergent, dish soap, dishwasher detergent, paper towels, toilet paper, plenty of extra blankets, plenty of washcloths and towels, coffee, and kitchen dishes and utensils. We grilled mostly. There was even a folding table and chairs for extra guests.
Like other reviews said, 2 bedrooms are downstairs while the primary bedroom is upstairs. My kids (4 and 5) didn’t want to sleep downstairs at first but they eventually warmed up to it. The basement was pretty cold though. Beds were okay but pillows were kind of flat. Bathrooms are outdated but very clean so it didn’t bother us. Showers were small.
It was very nice to be able to park in the garage. Check in and check out process were very easy.
Overall, I’d highly recommend this house and if we come to South Dakota again, we will definitely be staying here again.