I stayed with my mum at the Valletta Art Loft in Dec 2016 (the week before xmas). I choose Anton's apartment from his wonderful pics and reviews and it delivered - the apartment is exactly like the photos.
It was super clean and actually, even more spacious than the photos depict.

Anton's response was almost immediate every time and though he unable to meet us on arrival, his lovely housekeeper did. Maria looked after us from the moment we arrived. Anton had even left us a bottle of wine in the lounge - a nice touch. Additionally, the day before our flight back, I even contacted Anton to ask him if he could give us a recommendation for a car service (to go to the airport) and he hit us straight back - the car company did not let us down and was bang on time:)

My mum stayed in the proper/master bedroom and I stayed in the 2nd room (couch that opened into a bed with a partition wall - so not a proper bedroom). The couch was super comfy and was just like a bed - perfect for a 2nd guest.

The location - is right at the heart of the city and so close to everything! 3 mins walk to the Grand Master's Palace; 8 min walk to the city gate (& main bus station); 5 min walk to St Johns Co Cathedral and near a host of very very good restaurants & cafes. After sightseeing daily - simply walking 5 mins to a number of restaurants was so helpful to our tired legs.

To note, the apartment is on the 4th floor - something to be aware of; wifi was brilliant.

On the whole, a fantastic stay and a great host - however just a small tip, that this is definitely more of a Summer apartment vs. a Winter apartment. So much so, that we're keen to come back one Summer soon!