If the customer has purchased a product, then. Most certainly least, customers must have a problem. Or lack of knowledge about the process of use. Because it is not as strong as expected.
In the event that the customer has purchased a product type. At least most, of course, the customer must have a problem or a lack of knowledge about the instructions because they are not as fast as expected.
In the event that the customer has purchased the product, and then, of course, most customers will be required to have a little problem, or lack of knowledge about the process because it is not in use. The expectations.