Firstly it's a beautiful apartment, just as it appears in the photos, it really was like a home away from home. It was clean, extremely comfortable and equip with everything you need. For me the location was fantastic, you are among the locals, but a five minute walk to the heart of Valletta and everything from there. The enclosed patio was a great place to people watch in the sunshine and quite comfortable. I didn't use the aircon much because if you open up the windows you get a lovely breeze, but when I did it worked perfectly. The block out curtains work a treat. You are in the middle of a old town where everything is close together, so there can be a bit if noise, especially on a Saturday night, but personally it never really bothered me. And there is a little shop right underneath the apartment for any essentials.
Becky is such a lovely host, happy to help with anything she can and has lots of great tips and suggestions.
In short I couldn't recommend a place more. You'll have a lovely experience staying here.