First off, let me say that I stayed at this property quite a while ago in the past, but just never got around to doing this. And I don't write or read many reviews online because I am very skeptical of their honesty. Anyway, I actually stayed for 1-night on April 2, 2005 and I can remember, because this was the date of the death of Pope John Paul II and I remember that around 10pm that evening, all the church bells in Vaduz, and I'm sure all over, were ringing which at first I thought odd but then realized that the Pope must have passed away.
Anyway, I had not pre-booked a room anywhere for this one night and quickly discovered what a big mistake that was and I now pre-book 100% of my accommodations because of what happened on this day. My friend and I spent 2 hours + driving around Liechtenstein in search of a vacancy for the night. I had no idea that so many properties would be close as this was smack dab in between seasons: after the winter ski season and just before the summer season was to begin. Luckily the Gasthaus Au had a room, although it was not ensuite; the bathroom was down the hall, which was not an inconvenience for us.
The property was friendly, rooms were simply furnished but clean and a very good breakfast served in the morning. Good value and I certainly recommend, but here's the most interesting part of this story.
The door to our room was hard to believe as it was the loudest creaking I've ever heard. It was almost comical as it seemed so exaggerated and easily could have been used as a prop on the set of "The Munsters". Every time you opened and/or closed this door, it gave a loud performance. My one concern was this excessively loud door creaking might wake up my friend, or worse yet a guest(s) in another room(s), if I needed to use the facilities during the night. (As I consumed a good quantity of wine earlier that evening, you can guess the outcome).
Around 12:30am-1:00am, I suddenly woke up to an odd noise. I was half-asleep and disoriented a bit, but heard a knocking or thumping, fairly loud, coming from the other side of the room where my friend was sleeping. The noise stopped. I figured it came from outside and started to fall asleep right away. Within a minute or two, and not yet fast asleep, the noise occurred again. Being more awake, I sat up (the noise stopped as soon as I sat up) and looked around the dark room. I was now convinced that it was coming from inside the room. I assumed it was my friend having a restless night of sleep and was inadvertently kicking something near his bed. But I quickly realized that there was no furniture by his bed and he was sleeping soundly, fully under the covers. Now I was perplexed. What on earth was this noise and where was it coming from? I decided to lie back in bed on my back, and I never sleep on my back, and gently closed my eyes and started to relax and breath a little heavier. I was acting like I was falling asleep in case the noise started up again, and it did. With my eyes closed, a pretty loud knocking started up again and it was definitely coming from inside the room. I sat up quickly and looked around and tried to solve this mystery. But like before, as soon as I woke up, the noise stopped. (I believe in ghosts, but have honestly had zero encounters ever in the past). I could not figure out where this noise came from, but one of many thoughts I had was a spirit being playful perhaps). Now I was wide awake and decided the I'd better take a trip down the hall to get rid of some of that wine I consumed earlier. As I was distracted with that odd noise, I opened the door to the hall and shut it behind me without giving it a second thought. When I was halfway down the hall, I stopped dead in my tracks and couldn't believe what just happened which was NOTHING! The door didn't make a sound whatsoever when I opened and closed it. Now I was really stumped because all day and all that evening, that door never failed to creak so loud it could have woken the dead, but at this one moment it didn't make a sound. So, I went to bathroom, came back to the room and this time the door gave the concert I had come to expect, and it woke up my friend and really startled him. I told him about the earlier knocking noise in the room, but he had no solution either. Is this hotel haunted? Very possible. Plenty of death throughout the continent of Europe with many dark periods in its history...but who knows? It is intriguing though.