Unit is a Portabuild/Portacom style unit with walls and ceiling made from insulated metal lined panels. Given this the walls don’t breath and ventilation is an issue with a strong musty smell on arrival.
Having said the above, the unit was as described and had all the needed amenities, was walking distance to town and was warm with a heat pump.
Overall it was fine, but ventilation is an issue which would be solved with an in-wall continual ventilation, the type which doesn’t lose the heat of the room.