Viator does not publish negative reviews. I've seen this mentioned on other forums as well.
I did two tours through Viator - one was great, one was not. I left reviews for both, only the positive review was published.
The quality of the tour is not the responsibility of Viator, I don't hold them responsible for that at all. But Viator advertises and sells the tours, they are responsible for proper representation. It is dishonest to publish positive reviews, and leave out the negative ones.
Not cool at all. For this reason, I will not use Viator again.
Product or Service Mentioned: Viator Travel Advertisement.
Reason of review: Dishonest advertising.
Preferred solution: Let the company propose a solution.
I liked: Ease of booking and detail.
I didn't like: Misrepresentation of tours.