I have trial both Merlin and ProjectX. I have used MS Project prior and have been looking for a Mac alternative. ProjectX "gets it". They have a Mac look and feel...better than any other PM app out there. My only complaint is that it is a little slow and not as refined as Merlin. With more refinement and speed this will be the best PM app on any platform. The only and I mean only competition is Merlin. ProjectX needs to be quicker and able to integrate seamlessly with MindMapping SW and open MPP files much faster. It also needs more error checking conversion tools to notify of conflicts and import problems.