Do my customers need to input anything different in order to make their names resolve?

Registrants will not be required to utilize any special setup for their IDN. They should configure their hostname servers for the IDN using the Punycode form of the domain (e.g “xn--probestck-w9a.info”) just as they would for ASCII only domains.

End-users (i.e.: regular Internet users) will need to know whether their browser (or other DNS application) is IDN-aware or not. End-users with IDN-aware browsers (or DNS applications) may simply type in the IDN (e.g.: probestück.info), as they would for ASCII only domains to connect to the domain.