Frank is a great host, very open and helpful with great communication throughout. The space is in a clean and in a good location in Sliema for access to buses and the ferry to Valletta, we had no trouble getting around. So, if you just need a bed and a base this is a perfect spot.
If you're looking for something a little more homely this is one of the less personal spaces we've stayed in with Airbnb - it feels far more functional as a temporary place to sleep rather than a living space.
The kitchen facilities are minimal at best and it's not really realistic to do any self catering beyond a bowl of cereal or heating up a pizza here.
If those points don't bother you add star or two.