The document discusses the controversy around the software MacKeeper. While most professional reviews praise MacKeeper, many users criticize it online. There are several reasons for this, including an alleged negative PR campaign by a competitor, aggressive marketing tactics, misbehaving affiliates, and confusion with malware called MacDefender. Both MacKeeper's PR director and a Symantec manager say criticisms are often based on rumors rather than experience with the software itself. While MacKeeper's marketing may rub some the wrong way, the document concludes it is not a scam and the software itself appears to be legitimate.