Jef Lippiatt ,
Owner at Startup Chucktown
I'm not exactly sure what you mean, however, I don't believe that "no buyer's remorse" even exists. But many companies please their customers, so why would I say this?
I'm sure there are more reasons that could be added to this list, however, I feel like the 10 reasons above cover the majority of cases.
You and your business can do things to minimize the above cases, but you can't completely eliminate the issue because the outcomes are based on a complex blend of customer expectations, personal baggage (issues) and human nature (psychology).
You set yourself else up for success by presenting customers with detailed, accurate and transparent information about your product and services prior to the purchase. You also help yourself by guiding the customer to the product and services best suited for their needs. Also by reinforcing the value they are getting for the price helps eliminate the feeling that they aren't getting a good (or the best deal). You can also do yourself a favor by having a clear return/exchange/refund policy, a detailed knowledge base or FAQ section and helpful and timely customer service.
The rest is really out of your control, but that's okay. Only focus on the aspects you can positively change.