My boyfriend and I stayed at Simon's flat for a week in June. First of all, I want to say that the location in Sliema Balluta Bay is perfect as everything can be reached easily within 5-10 minutes - restaurants and beach/bay. Simon was really helpful and always available if we had questions.
In the beginning, we were a bit worried that Simon's pub next door would be too loud at nights but his pub is lovely and really a place to go if you want to relax over a few drinks as it is really popular with locals. The noise was no problem at all.

The flat itself has everything that you need and was overall tidy and comfortable.

I would highly recommend Simon's flat for a stay in Malta.