So, one way to obtain feedback is requested. Yes, banal request to your client that already bought your product and was very happy. In most cases, if not ask the person you'll never wait for feedback from him, despite the fact that your product really is terrific and the customer simply delighted with his acquisition. Therefore, you should ask him about it. Say personally that have a need to comment on the acquisition you have the goods. For this to compile all the contact details of clients, that anything you buy. So, you will be able to continue to contact them and ask them to write for your feedback. But please note that you should not write immediately after the purchase because the person does not have time nor acquainted with your commodity, nor to get concrete results from its use, and hence will not be able to make an objective opinion about it.
But the pull is not worth as a man by that time may already be "cool", and also from that nothing good will come, and you wait long for no reason. So try to choose the optimum time, sufficient for the client to have time to fully acquainted with your product and get the first results. Also very well be, If you have the number of questions, responding to a customer will be able to more quickly write for your feedback. So, you really help your client. After using these questions, the person receives an outline of the future revocation, and it strongly makes life easier, since many people have no idea what to write in such cases.