Having a welcoming lovely fragrance in your unit or hotel may help people to relax.
Careful with what you buy though. Some people (including me) are quite sensitive and allergic to some brands that contain cheap and nasty chemicals.
Also, beware with cats and dogs - and other creatures that people have in their houses. They can become really sick of these products.
Go natural is great but sparingly.
I tend to now use essential oils and put a few drops in the cleaning pray which is also natural, since defusers give me runny eyes....
And a little bit of lavender/lemon in the bedroom.
What is your experience?