I am a long time user of P3DO and have found it very useful; my problems have mainly been that D/S does not always like the way I've reorganized my files (Poser seems to  have no issue with it and can 99% of the time find everything just fine) so that I can identify different content folders more readily.  There is also a problem with some vendors not setting up their zip files correctly; that is mainly things don't always go where they are supposed when you unzip their folders into a Poser directory.  In this case P3DO has helped me find where stray files have been placed incorrectly and to restore them to the properly directory.  It is an invaluable tool that I have used many years.

That having been said P3DO has made it easier for me to track down items I've been looking for when I've not know exactly where to look.  Their support is excellent and they have always worked very hard to resolve any issues that I might have had with the program as it's gone through it's various upgrades.  I highly reccomend P3DO Pro; it offers extra functionality that free version doesn't have--but the free version is also a help as well.

Daz Studio 3's new database search engine also has problems with my various runtimes (as expected)  because I have not always stuck to the default names for content folders; so it is possible that PzDB won't work for me well for the same reason.