The apartment is very new, so everything is very fresh. It is above ground, but it did feel a bit dark and dimly lit like a basement suite can. It is a very functional space, but it wasn't what I would call a home-away-from-home.
The apartment is in a residential neighborhood, which is a nice respite from the hustle and bustle of downtown. As others have commented, it was very easy to take Uber to any of Nashville's sights. It is close enough to walk, but it was quite a slog in the summer heat! Walking does involve passing under the railway tracks and through some isolated, not well-lit areas. I wouldn't have felt comfortable doing it alone at night. Even if you take the free shuttle, this part of the walk is still necessary.
Our host was very responsive in answering our questions during our stay. Coordinating our arrival / departure with her was also very smooth.