Best way is to have the prospect meet a current PD patient. Also, be sure you advise the patient of some of the pitfalls of an HD fistula (frequent need for multiple fistulas), the possible need for a thrombectomy, etc. I have a PD cath and it's a small price to pay for not having a fistula.
I'd also suggest the prospect meet the PD patient outside the medical setting, and without any professionals present - that way, the patient can get an unfiltered opinion without any concern the PD patient is choosing "polite" descriptions to not offend the medical caregivers.
Choosing PD over HD was one of the best decisions I have ever made.