If you an ebay user and want to let others know what happened to any transaction of yours post your extensive story with all details of the transaction. Eliminate untrustworthy ebay merchants by stating your point.
Make a funny comments about the operating system you use and in what shape your computer infrastructure is.
Always check rating of the company and read carefully all cases, either succesfully closed or those which are unsuccesful.
Write about video games you have played. Let others see your review before they purchase.
Customer complaints are a powerful tool and ususally result in a response. This can only work miracles if used by the customer service managers in order to improve the services provided.
Whether you have a problem with a company, which needs to be sorted or just want to leave a positive feedback you have come to a right place.
Fight with unfair parking charges or public services provided by councils, management companies, estate agents, etc.
Make others aware of unacceptable treatment you received from health service providers, be it private or public or local government or council departments.
Point out difficulties you might have experienced while using online services like internet shops, nuisance emails, spamming websites, malicious software.
If you decide to post a business review you allow other customers to learn by your experience and make their decission about dealing with this company more careful.