The penthouse is excellent. First of all, it is sparking clean and full of light. The property itself is well-equipped with literally everything one may need for a short or long stay. Wi-fi is very good. The place is very peaceful and views from the terrace are simply beautiful - you can see Maltese countryside and Mdina. If the weather is good, the sunset is all over the sky. There is remarkably little construction noise and I was pleasantly surprised how quiet the surroundings are.
Amenities and location - the bus stop is around the corner and there is a very good convenience store right there with some local specialties (in addition to regular groceries). The village of Zebbug is charming by itself, it has a lot of interesting historical and cultural sights. Evening walk around the village core takes you back in time - there are quite a few houses with unique architectural details and small chapels, it's like a small discovery walk. I ended up reading about the history of the village to educate myself.
Joseph, the host, is a very kind man. He helped me with luggage (I had tons of it). Since I stayed during Easter, I even received a traditional sweet (figolla), which was a nice and unexpected gesture. I would definitely stay here again.
Highly recommended!