The Gallup World Poll conducted surveys on a wide range of subjects in a representative sample of people from 132 countries from 2005 to 2006.

Another limitation is that brands for this study were not selected strictly on the basis of market share or to represent a broad range of tar yields, but rather were a convenience sample.

You can see in the sample output that there is a wide range of information here, from problems and issues with hardware devices through to issues with the current configuration of the mail service.