Valhalla has been a great host. Super quick answer, even until late. They gave us great tips and even helped out when I asked for unusual tips.
The room has been very clean. We didn't even bother to get plates when we made food, we just ate straight off the floor. No but honestly, it was very clean. The room is even more spacious as it seems in the picture. It is a bit dark, but with the strong sun in Malta, that could also be a good thing. The air conditioning worked flawlessly and is very modern. The shower is great and spacious. You have your own personal toilet and shower. The room is also private. Imagine an apartment complex with several flats, it's like that. You come into the house and there are multiple floors with different flats where everyone has their room. The walls are thick, so we never heard anything from the neighbors, except when they entered their codes to open the door.
The location is very nice, there is a mini market just next door so you can do your shoping there (it's not much more expensive than a usual supermarket). You have to walk up or down some pretty big slope of streets to get there, but that is Valetta for you. So if you're not able to walk well you should consider that.
All in all we have been very hapy with that room and the host. We had a nice welcoming gift the room has glasses and a small fridge (there is also a big community fridge and freezer). We couldnt have it any better. I would reccomend everyone to get a Airbnb from Vallhalla. Very friendly hosts and a great trip.