Diana’s place was super convenient, location wise. Right next to all the big monuments.
The apartment was very small. Just enough space for two people who aren’t sleeping so much and don’t need a lot of room to stretch (both of us are short so it wasn’t the worst for us).
There is a shower in the apartment but not a toilet. So be prepared to run down the hall if you need to pee during the night.
But the location was unbeatable. We were jet lagged so it saved us a lot of time getting from one place to the other. We used the metro and walked a lot.