I stayed at Jennifer and Stefan's place during a 3 month stint in Nashville and couldn't have asked for better hosts. They were both very nice and responsive to my questions and maintenance requests.
The house itself is located on a quiet street in a suburban subdivision with most places that you'd want to visit in the Nashville metro area within a 30 minute drive. There are also plenty of good restaurant options, supermarkets, and a Wal-Mart nearby. The place comes well equipped with mostly everything that you'll need, such as all sorts of blankets, towels, silverware, dishes, cookware, etc. I stayed there over the summer and the house was kept at a constant comfy 72 degrees, which was a nice respite from the hot and humid Tennessee summer.
I rented the master bedroom and it was great! It was a decent-sized room that was super bright in the daytime and facing a thicket of trees in the backyard. It is also well-lit at nighttime from ceiling flood lights and quiet when you wanted it to be. There was also a large walk in closet to store all of my belongings. However, the best thing about the room was the amazing walk-in shower. Piping hot water on demand from the tankless water heater and awesome water pressure.
At the time of my rental, two other rooms in the house were being rented out and your experience staying here to a large extent will based on how well you get along with your housemates. That being said, how dirty the common areas will get (i.e. kitchen, garbage, living room, etc.) will be completely based on how clean/messy/lazy your housemates are and their sense of responsibility.
Overall, I had a great experience and if I find myself needing to travel to Nashville in the future, I wouldn't hesitate to stay at Jennifer and Stefan's place again.