The location of the apartment is perfect. Excellent choice of bars, restaurants, breakfast places, coffee bars, souvenir shopping etc. Once you are in the apartment everything is within walking distance e.g Acropolis, Acropolis Museum, Plaka, Syntagma Square, Ermou Street, Anafiotika etc.
The transfers arranged were excellent. Very friendly drivers and they provided excellent information for things to do, where to eat, what cuisine to try etc. Their services are recommended.
I recommend having dinner atleast once on a roof too restaurant, view is amazing during sunset and after it gets dark. Acropolis gets lit up with lights (something you don’t want to miss)
Honestly, I used the apartment only to sleep and getting ready. It’s perfect for that. Only issue I found the bed is very stiff. It was a minor inconvenience.
If you are looking for a local SIM card, it’s cheaper to get from a vendor on the street. Vodafone card can be obtained for €12 for 10 GB with international calling (specify which country you want to call). The same from Vodafone store is for €20. You can find vendor at historical sites e.g Acropolis, Ancient Agora etc. They may not be working on weekends though (especially on Sunday - not sure about Saturday). Wifi in the apartment had good speed and coverage.
As far as hosts are concerned, they respond very quickly and provide you with information and recommendations. Always helpful. I didn’t see them in person though. Watch carefully the video they send for check in and check out. It will be helpful and make things easier