The package appears to be feature rich and provides a variety of ways in which to analyse and control project details and progress. The fact that the package is used by large companies such as Intel, Motorola and Hewlett Packard gives a good indication that this could be a useful business tool. It could also be used to demonstrate business planning techniques to students where the course involves serious project management techniques. The main problem is that you cannot get up and running quickly.
Time needs to be invested in reading the manual in some detail and experimenting with the software.
After that, there is no doubt the product is worth using. Both user manual and on-screen help are comprehensive and well put together although some jargon is used. The fact that the package gives one the ability to present project information in graphical format is a bonus and useful for both explaining project progress for senior management and keeping the project team up to date with all the details of which they need to be aware.