Location, location, location! Been coming to Nashville for years now, and I would venture to say this was by far my favorite place in terms of location. It's situated just a few blocks (walkable) away from 12 South, which is one of the best neighborhoods in the city, in my opinion. Plenty of restaurants, bars, etc. and the proximity to everything you'd need during your stay is great! Katie was a fantastic host--very quick to respond to anything I inquired about and gave great suggestions on new areas to explore that I hadn't spent time in on previous trips.
One thing to make note of: the garage pictured is the homeowners', not for the guest, and the noises from below did on several occasions cause some disturbances in the unit above. Though I did know it was a "guest house", I hadn't assumed the residents would be coming and going in and out of the same structure, and at early hours of the morning. The apartment is built right on top of the garage, and the garage door aligns with the headboard of the bed, so bear in mind, any time it opens and closes, you're going to feel it. :) There are also some VERY heavy doors below that shake the entire structure (I'm from California, and it felt very reminiscent of an earthquake), so just know that in advance, you may be rattled out of your sleep.
Another thing I overlooked in the profile is that there is no microwave in the unit. I'd recommend the owners spring for that purchase, as it did make reheating leftovers and certain foods a little more difficult than usual. I made the mistake of doing my grocery run before noting that there was no microwave and ended up wasting a whole lot of food because of it. I'd also suggest that they provide brand new sponges, since there is no dishwasher. I'm not the biggest fan of using a dish brush that has been used by all prior guests. Minute details, but some tiny improvements that could make a big difference!
Other than that, the stay was great, and none of the drawbacks had anything to do with Katie as host.