The pros: location was a sub-$20 Uber ride to just about anywhere in Nashville, including the airport - no drivers had difficulty finding it, although you have to walk out of the complex to ensure they see you when you arrive; decor was nice and kitchen was very clean; easy to use Roku TV and amenities; super-cold A/C, although it had to come on frequently to keep apartment cool (insulation issue?) and the volume of the A/C unit was loud (see below); no bugs/pests; plenty of room in each room to spread out; nice, large kitchen.
The cons: train tracks a block away meant train whistle woke us up several times each night...not much the owners can do about that, though, but be prepared; A/C (mentioned above) is extremely loud when operating; bathroom shower/tub tile peeling/damaged - quality of this space less than the rest of the unit; only four towels provided, so be prepared to do a load of laundry if your stay is more than a couple days.
Overall, we were mostly fine with the space as we spent most of our time out in Nashville doing things. But some sleepless nights took their toll (again, not the fault of the owner, except for the turbo A/C unit) and I think a longer stay would've been taxing. Location is a bit sketchy, as some late night disturbances woke us up (e.g. loud bangs - either fireworks or gunshots, shouting) and 3 out of 5 Uber drivers told us to be careful at night, but we didn't have any situations where we felt in danger or worried. I think some of those feelings in the other comments are misplaced, but your mileage may vary.