Whenever possible we want to attach a survey request to a piece of information your customers are happy to continue to receive.
If you ship via UPS or Fedex and use our integration you may choose to send an email with a link to track their package and a 2nd link to give feedback like this example; (ID220 is designed to send the output to the person listed in the ordered by field of the sales order)
Or you can send a separate email out one day after the supply order is invoiced.
As with all our surveys the questions can be completely customized. Here are a couple of samples.