Constantin and his wife were very nice and kind. Everything was clean when we arrived even though we were there earlier than expected. And to top it up, we were welcomed with sandwiches for luch!
The flat has lots of space and it has just been built/ refurbuished. The neighbourghood is quiet and the sea is a 5 min walk. It was difficult to find supermarkets open till late around but once you get to know the area, that is not a problem. I strongly recomend Constantin's flat to stay in Malta. Just come prepared to provide a cash deposit of €150 and banks usually charge a 2€ fee to withdraw money.