Close to Panepistimio and Syntagma Stations. Many restaurants and bars nearby. Quiet property (except when the couple in one of the other apartments were having a very enthusiastic shouting match). Other occupants of the building were peaceful and polite.
One mosquito came in and it took me a while to fight it into submission. Possibly my fault for opening the window wide, but I wanted some fresh air.
I used the iron, the ironing board, the Nespresso machine, and the fridge, but I didn't use the minimal cooking equipment, nor the TV.
I found some delicious fruit at nearby Deli and Fresh, and Nespresso capsules at the nearby Nespresso boutique.
It took me a little while to find out how to turn on the water heater (I didn't manage to get the QR code to point me at the information) - but I found the water-heater switch in the fuse box after I had tried every other location.
On one afternoon only, I was unable to unlock the street door as it appeared to be bolted. I sent off an e-mail to Olala Support and within five minutes I heard the street door unbolt itself remotely. Nobody knows what happened or who resolved it. After that, the door locking returned to normal, and I had no further problems.
All in all, it was an enjoyable stay.