I have DHPs in several enclosures and really like them a lot. Thermostat settings aren't really different than for a CHE, but temp probe placement may be different.
I started writing a long post and then remembered that Arcadia Reptile (the company that produced the first DHP, though other good ones are also available these days) very recently produced an excellent video about what DHP are and how to set them up. Give it a look and if you still have questions I will do my best to answer them.
https://www.youtube.com/watch?v=8XHV...ArcadiaReptile