The good
1. Great location, right next to a local stop. Makes it easy to get around. Specially since buses are usually late.
2. Accurate directions from host, made it a breeze to take public transit and reach the place.
The ehh
1. The bathroom was a little small.
2. Key to outer door (the one on the street) was really tricky to use, make sure you try it before the host leaves.
Things to note
1. About 10-15 minutes walk from Colosseum
2. Little noisy due to sirens, so if you are a light sleeper get earplugs. I would expect that it's a common issue throughout Rome, nothing specific to this place.