Super smooth check-in and great communication - Karl even let me check-in super early (like 8 am) - which is quite rare. Karl's place is perfect for upto 2 people wanting to explore Malta. The bus stop whoch has buses to literally everywhere is just at the alley, there's a nice garden with views of the harbour on the other side. The steps in the building are a bit wonky so be careful but that is just part of the charm of living in a historic district. The flat itself is modern with all the amenities you might need for your stay, including a washing machine and heating (it was chilly in the nights). He also had a first aid kid that came in handy when I accidentally hurt myself.
Overall, for the price this is one of the best value you can get this close to Valletta. I recommend it!