Its about a year ago since I've used PPS so I don't know what improvements have been made to it and the Crewbriefing was a new product then but the principal of it all looked good.
Overall PPS is a good, accurate and simple tool to use. There are some issues with it still being MSDOS based but you shouldn't have to many problems depending on your computers operating system.
Its certainly one of the more user-friendly systems I've used, no keywords just point and click.