Customers and visitors who trust you will undoubtedly trust your recommendations. However, you must exercise extreme caution while employing this method. If you start advertising anything on the basis on recommendations, your credibility will suffer.
This is especially noticeable when recommendations appear to be overdone and without much validity. Do not be scared to express your dissatisfaction with a certain product or service. Rather than costing you any points, this will make your proposal more realistic and improve your credibility.