I agree research is valuable in helping create product differentiation. Along these lines, are there products that are more difficult to research

 I agree research is valuable in helping create product differentiation.  Along these lines, are there products that are more difficult to research than others? For example, are consumers willing to talk about financial products as much as the would laundry detergent? I also work in the financial services industry, so I have my own thoughts/experience but would like to hear from the class if you feel conducting research in some industries is more difficult than others and why?