Although I have never had a horror story with Airbnb as some people have, in the six or so years that I have been using it, this is what I have found:
90% of the time, there is some significant issue. Either it is in trying to find the place, or in trying to gain entry. Or the place is dilapidated or has many maintenance issues. I have found the reviews to be unreliable as well. In contrast, when I book a hotel, there are only significant issues around 10% of the time, plus the reviews are much more reliable.
In using Airbnb, I am relying on amateurs. The problem is that when a person travels, they are more vulnerable and insecure because they likely have no network of friends in the area. Traveling is generally stressful enough without unpleasant surprises. I find that in using Airbnb, I really save little money and its just not worth the hassle. In the future, I will be using hotels and other alternatives.