We really enjoyed our stay in Sonja's flat even if we didn't meet her or Judy ! First, she arranged the pick up at airport which was a nice touch because of our weird flights hours of arrival and departure.
The flat is awesome, very typical and efficient. Everything was there for us to have a good stay. It's true that the flat can be wet, especially in winter, but the heater and the air dryer does an ok job, even if they can be noisy at night.
The flat is located perfectly, in a side-street, in the center of valetta, close to the bus stops. btw it's a good advice to be located up in the city (close to the city gate) so you don't have to climb all the streets to get to the buses (it can be steep). For the info, it's not very well isolated so if a car tries to pass by your street (which is rare), it can be very noisey (vrooooooooom :)).
Sonja and Trudy are very fast to answer and a Whatsapp local phone is provided early. They gave us a lot of good informations so that's perfect.
Definitely a steal if you're staying few days ! Would recommend !