I tried a couple of their personality tests. At first I was wary because I thought they were silly as is often the case with online quizzes. I had to change my mind. Those tests are well done and give a lot of information. I was not disappointed.
They deleted all my reviews, positive and negative, after leaving a bad one about a big phone company. To be more precise, they banned my account deleting all the reviews in it. They didn't even bother telling me, I found out myself months later.
Is this an acceptable behavior from a company that blathers on about ethics?
Not at all in my opinion.