We've stand at the apartment for 5 days in off-season. We were 3 to 5 adults.
We've arrived at midnight to Malta airport and transferred directly to the apartment by hosts (30 euro).
The flat has three bedrooms (1+2+2 people) and a large common place with a kitchen and a big sofa.
Very good location with quite neighborhood. Just 5 minutes from a local stone beach. Close to bus stop and not far from highway. Approximately the same distance to all sightseeings in Malta. Only 15 minutes by car from Gozo ferry terminal. 20 minutes to Mdina. 40 minutes to airport. (These are real times we've spent)
Near the apartment there is a small supermarket with all goods and fresh bread (the shop is closed Sundays).
In the apartment you have all you need to stay for a long time. There is a small backyard with washing machine, where you can wash and dry clothes (but bring your wash powder).
In the apartment we've found two Malta's electricity outlets suited for European plug (they have the same 220V voltage, but different holes layout). For us it was enough to charge our devices. But mind a proper adapter G-type.
WiFi works good (we used it only to transfer photos/videos).
As usual on Malta, tap water was awful and could be used only for washing. Do not forget to buy couple of bottles of drinking water.
I can recommend this apartment and its hosts.