Communication with Jessie is very easy and she is very kind. She also replies quite fast.
The apartment was very clean and very comfortable. As it is a basement apartment unfortunately we had no reception inside but there is reception when you go out in the private backyard.
The bathroom is perfect, the bed is comfortable and the sheets are in perfect condition. The kitchen is fully stocked and the living room has some very nice sofas as well. The air-conditioning in the living room and the bedroom is pretty good (it is Daikin after all).
Be mindful to bring adapter with you but even if you forget it there are 2 USB ports which you can use to charge your phone. The TV is great btw, we had some chill time to enjoy Netflix. (note that you need to have an account to do that).
The apartment is quiet but very close to the main Street as well. It is 12 minutes away from the bus station and about 10 minutes away to the ferry for the 3 sites. I would recommend staying in Valleta as it is kind of in the middle of the country and very well connected with all kinds of transportation. For about 3 days and a half we managed to visit all the major attractions in the country. I would also recommend visiting the tourists information buro in the airport right after landing. The people are very nice and will help you with a bunch of maps and catalogues on what to visit and will also help you plan what to see and when. The bus you need is X4 - it is a direct bus from the airport to Valleta bus station. From there you have 12 minutes by foot to the apartment.
I am very satisfied with our stay. Maybe the only inconvenience is that the WiFi is only in the living room and part of the kitchen. But overall that's not such a big of pain.
Some advice on food and entertainment: On Friday there is live Jazz music in the Bridge Bar, Sally's which is 3 minutes away from the apartment has amazing Italian food (it is cheap too)