My therapist is predominantly person centred and UPR is one of the core conditions of person centred theory so it is an important part of how he works.
That's not to say he doesn't gently challenge me on unhealthy behaviours. For example, he has said he is 'concerned' about a certain coping mechanism, which gives me space to explore it without feeling judged. He is talking about his own feelings and that gives me an opportunity to reflect on my own. It definitely works for what I need out of therapy though I can understand others might prefer a more directive approach.