Logo's vs Unique

I was watching a commercial for Shell gas station and a good point was brought up.  A man said that he knew a lot about marketing and that the key to market is having many logos everywhere.  Someone else commented saying yes that'd important however it is more important to have a unique product.  I don't necessarily know if having one or the other is more important.  Having your logo's everywhere definitely catching the attention of your target market.  The more your brand is in the public eye, the more people will  remember it and most likely buy it.  If you brand is not unique however, no one will buy it.  If your product is bland and similar to every product in that area, then the more logo's you have will just be over looked.  Your product must bring something to the table that your other competitors product does not bring.  Both the constant marketing and uniqueness of the product are extremely important.  Is there anything else that make a product successful?