I would definitely recommend Silvan's apartment. It is very spacious (pictures do not do it justice), the apartment is in a new building, stylish and clean. The location is central in Birzebbuga, it is close to the sandy Pretty Bay beach (2 min. walk), restaurants and bars, bakery, fresh fruits stalls, food and other shops. Bus stops are close too, so you can go anywhere from this location (you might change few busses for farther locations though). There are direct buses to Valletta, it is around 30-40 minutes ride (depends on traffic) and direct buses to/from airport (around 20-25 min. ride). Despite the central location, the neighborhood is quiet, the only louder sound is clock tower bells of nearby Church St. Peters Chains, which is one of the local points of interest. Check-in and check-out are very easy.
Silvan is a very welcoming, helpful and attentive host! A couple of times he asked whether we need anything and if everything is ok. He responds very fast to any questions and inquiries. Communication is very easy (through Airbnb messenger).
All in all, we had a very pleasant stay at this apartment and awesome time in Malta:)