Like in politics, it holds true with everything. Positive ads are usually full of "plugs" with minimal information and no mention of flaws. Positive ad's go so far to maintain tone they pretend a gift from heaven has been delivered unto earth. Negative ads are usually full of criticism, with a LOT of information and objectivity. Sometimes the flaws are exaggerated to live up to the stance. That said, negative ad's are ALWAYS more informative than positive ones, and positive ad's usually are made in the form of "company employee goes to review site, pretends to be a normal reviewer and spams positivity". This can be combined with removing any comments that arent positive or making 20 accounts to trash the person who complained, so it looks like one crybaby has a problem and 20 normal people set him straight when in reality its one HUMAN on both sides. I personally ignore ALL positive ads and reviews, smelling either a paycheck or brown nose. I also pay attention to ALL negative ad's then look closer at the information to see what holds water.