I would expect it to be immaculately clean and well appointed, with everything to be high end, from towels, to bed linen, to appliances (kettle, toaster, coffee machine, microwave, cooker, dishwasher, hairdryer).
Fully stocked kitchen - premium crockery, utensils, knives, glassware etc.
Luxury bathroom with premium products, good water pressure in shower.
Luxurious flooring / carpets, rugs / furniture / soft furnishings.
A theme or cohesive decor. Local artwork or pictures.
Well heated / air conditioned to suit climate.
A welcome basket with local produce would be nice, as well as providing basics such as tea, coffee, milk, Prosecco, water.
Local information / suggestions where to go for meals etc.