My problem with Rapture Pro is that the GUI is just not designed that well. I can see three times the parameters in Rapture Classic, and it takes half as much screen space.
I do actually like and prefer certain things about RP better than DP and Rapture Classic. For one, I can install it in any directory. Its predecessors had certain paths hard coded, so that if you wanted to install the data to a second drive, you had to install symbolic links in certain directories so it could find your files.
I also prefer RP navigation over its predecessors, as well as having a macro panel.