The main problem is - people doesn't read any more. We are all bombarded with too much informations on every step, every day especially while traveling. Plus, guests often book via phone application where everything is less visible on the first sight and harder to read.
Also, they are on the move from one place to another, changing cities, planes, trams, buses, ABB-s... and their heads are full of all kinds of informations. Listening all those instructions at every transit ABB room immediately after they landed or parked their car is sooo boooring.. I often feel like a mother dealing with a bunch of kids. It is better to show them and let them try to do it (lock the door for example) then just to write or tell. The worst are groups larger than 2 people. It is impossible to get the attention of all of them in the same time.
The most effective is to have short notes all over the place, although it is not decorative. For example self checkout instructions hanging on the entrance door, A/C manual by the remote controller, heating instructions hanging above the wall thermostat... etc...