Merkanti is one of the long streets that run the length of the capital, Andre and Isabella's apartment is about two-thirds of the way down from the main areas.
Valletta is a small capital city and you can learn the layout of the main routes in a few hours. The streets are narrow and almost all buildings are four storeys high. I would imagine that it was designed like that to bring shade and breezes to the residents during, what we have been told, can be 40° summers. During our week at the end of March we had one rainy day with bright sunshine on the others and up to 20°. Very pleasant.
One big bonus is the Food Hall 100 m up the the road with about 20 vendors selling meals of different kinds. We used it on several days when we had had a nice lunch out or were intending to have dinner in a restaurant. Particularly good value (and very tasty) was The Salad Bar. Downstairs is a mid-market 'grocery store'. Excellent.
The apartment is compact but comfortable, quite clean and with good amenities. The bed was comfortable, if a tad low for us but it would be perfect for anyone under 50!
Excellent security, dimmable lighting, well equipped kitchen, the TV is plenty big enough, carries BBC, France 24 and CNN, so there is no excuse for not keeping up with the chaos of Brexit or whatever takes your fancy.
There are plenty of restaurants and bars, all within walking distance.
No excuse for not enjoying yourself!