The location is very nice as its right on the seafront. In the summer I guess it might get a bit noisy. The place was clean enough, the wifi worked great. However the towels started to smell and we asked for new ones which the host forgot to deliver so we were told to help ourselves with the ones from a neighbouring apartment.
There was a severe leak from the ceiling during a storm that trickled onto the spare bed and the luggage we had on it. The host was aware of it but failed to warn us. Also the system under the kitchen sink started to leak badly flooding the kitchen floor. The flat needs a lot of maintenance.
Marsalform is otherwise lovely but I recommend travelling to other parts of the island so either renting a car or motorcycle.