We spent a few nights at Kenneth and Fiona's apartment and loved it. The hosts are very friendly and good with communication.
The apartment is very spacious and situated in a top location. The view from the balcony is surreal and we loved to sit there and enjoy the sunsets while enjoying a good glass of wine. As it faces the sun in the afternoon, it can get very hot inside; but there are many fans in the apartment, and AC (at an extra cost). Transportation to Valletta is very easy and affordable. The area was very quiet despite being just across the harbour. Beds were great (firm mattresses) and the shower had great pressure. Good washing machine. Kitchen utensils though were a hit and miss, and cleaning could be better.
One thing to note is that there's only one very small shop in the area where you can buy food supply, and it has very erratic opening hours.
In a nutshell, a great place to stay in Malta. We had never been to Malta and can't wait to visit again!