If you are open and honest with me and not hide information from me. For example, if you are selling turnips, and you want me to buy from you, rather than your competition, telling me things like, they are home grown, explaining the process where they are grown and harvested, etc. This would work in your favor. However

if you told me all these things, and one of them was either a lie, or a deliberate way to get my business and not your competitor, you would not only lose my business, but everyone I talk to that mentions turnips.
Most people work that way. If you give them great service, loads of useful information, instead of information that distracts from the product, and back it up with a great product, then you're set.
So many people make that mistake, seriously. They tell you what they think you want to know, and not what we're supposed to know, like the turnips were cultivated near a nuclear power plant.....

(<- my new favorite smilie)

.