I've been using P to M in various versions for several years. The app continues to improve through the new releases.

P to M is MUCH better at combining movement (Ken Burns), titles and sound than iPhoto plus iMovie, particularly because it is more flexible on allowing you to move around the frame. There are definitely still improvements that need to be made in UI and my one major complaint is that the manual should be re-written from scratch. The developers are aware of this and I think are working on it.

Special kudos to the developers for their tech support. I've been critical of them in the past -- as it turned out because I wasn't getting their responses due to my spam filter -- but no more. Every question/problem that I've had in my recent usage has been answered promptly and they've stuck with it until the issue was fixed. That's worth a star right there (note, in my star rating I'm rating the support, not the documentation.)