If you´re only in Malta for a short stay, plan to eat out and use the place for sleeping / showering only, you will be perfectly fine staying at Gibb´s place. It´s clean, a very good walkable location, close to the promenade, shops and restaurants, the bed is comfy and the wifi is fast. :)
I don´t recommend it for longterm stays since it´s not very well equipped in the kitchen and bathroom. We had to ask for an extra set of towels and sheets and it took 3 weeks for our host to drop it off. Also, there´s only one key that you need to lock the apartment - so if you are staying there with a second/third person you need to make sure to leave and come back to the house together. Having to admit that we got super unlucky with several hourlong power cuts, very noisy construction work and water shut-off, I don´t think that the host and owner have handled that very well.