The Net Promoter Score survey is a wonderful tool for surveying your customers about their satisfaction and getting valuable feedback from them. However, you can already use the NPS for users who are not yet full customers. Your trial users. After the first half of the trial period, send these customers an NPS survey to get more information about what they think of your product.
In the enedavor to make sure customers have a redeemable purchase and grat customer experience, mistakes can happen every now and then, this is simply part of the process where people work.