The view was amazing and the apartment really spacious. We stayed here 2 weeks in March and we recommend to not stay here in winter. It was super super cold, there was only (or at least) a portable gas heater. But since the apartment is big and has no door between kitchen and the rest (apart from the bedrooms and bath) you only have the chance to get a little warm when you are right in front of the heater. Even wearing several layers it was still freezing cold. So maybe in May/June will be fine but not in winter! The window in the bedroom was broken so it didn't close. We repaired it a bit but once you open it it won't close completely again unless you repair it every time again. The walls and especially the bathroom were quite moldy. The kitchen was great, well equipped and with a nice view while making dinner. The hosts were nice and helpful with refilling the gas which comes at an extra fee.
The whole Xlendi Bay is a complete construction place!! Right next to the apartment house the build a huge hotel and they start working before 7 in the morning. Only Sunday is off. This might not be finished before summer 2023, so keep that in mind.
All in all with all these downsides the apartment is way overpriced.