The main reason I love POP is the colors that are possible. It's hard to duplicate them with standard silver gelatin paper and secondary toners. A second excellent reason is the density range. To the best of my knowledge and experience, only bromide paper is a close match.
There are reasons one might choose to avoid the process. First, it uses more silver than developing-out paper. Second, unless you live somewhere with reliable sun most of the year, a UV light source is required for exposure.
Below: A century plus-old 5x7-inch dry plate and its digital positive (retouched) from the scanned plate. The shadows and highlights are leveled for maximum detail. A properly exposed and developed negative has a wealth of information. The goal of any printing process is to not lose any of that information.