I don't understand what people are complaining about when they use google for generic product searches like this. What do you expect "iPhone 4 cases" to return

I don't understand what people are complaining about when they use google for generic product searches like this. What do you expect "iPhone 4 cases" to return? Links to reviews? Links to Apple's online stores? Links to other retailer's stores? Links to information about what the cases are manufactured from? I don't understand what a search engine is supposed to do in this use case. How can it divine which of the many things related to iPhone cases you're interested in? This generic search could go in many different directions. Personally I would never think go search google directly for a product review like this. Amazon is the best-known place to find reviews from fellow general-consumers. When you use a search engine, I think the key to efficiency is having a firm idea of what type of results you'd like it to return before you press the "Search" button.