If you submit a genuine BUT negative review there automatic censorship rule systems may delete your review or at worse block any future reviews. You can challenge deletion but done expect quick response. In addition it seems many many genuine responsible companies large through to small don't bother reviewing reviews or even responding let alone try to fix problems reported. So it's really bit of a waste of time but helps probably de-stress any annoyed reviewer by giving them a tool to vent THERE anger! Better to compliment and or complain the old fashioned way nice or not so nice letter to the company HQ and Chief Executive by researching his/her name. 99% chance of a response.