We stayed in Chiara's apartement for 4 nights and it was our first time in Valetta. The apartment is well located, in the center of the city, very quick access to all the restaurants or the fast ferry. The fact that the apartment was very near was convenient if we needed to stop to rest or eat there. The bedroom is exactly like in the picture and it's a beautiful room ! We didn't try the TV, however there's wifi, a coffee machine, towels, hair dryer ...
However, like some people said in the comments, there's in fact a musty smell that stick in the kitchen especially (it's okay in the bedroom since there are windows). It did not bother us that much because we did not spend much time in the kitchen but you should consider it if it bothers you.
Another inconvenient was the noise. The neighbors are not noisy, it's just that all windows are really thin. Used to double glazing in France, it disturbed us but i'm guessing all windows are like this in Valetta.
In the end it was a nice trip!