Customer feedback is one of the crucial aspect of a business that the owners or the top management shoukd seriously take into consideration. Having a tool like this AskNicely to collect and measure those feedbacks will be a very good move.
I visited the website and noted that it is being administered through a reputable brand Salesforce. What's more, it uses a proven customer-centric metric which is the Net Promoter Score (NPS). These two considerations make AskNicely sound reliable. Nice hunt!