So that both of them appear to work well. The relation with the Rietveld method explains the easy introduction of the LB method in numerous Rietveld codes. Here is the list of available programs based on the Pawley and Le Bail methods together with the number of successful applications in the field of structure determination. In fact, few of them are really available directly by a free download on Internet. In fact, I have used an old version obtained at ILL-Grenoble.
Alternative is to use softwares extracting structure factors without cell constraint.
On this figure, PD is meaning Pattern Decomposition, and corresponds to 15 publications, which were not providing the name of the programs, but explicitly indicated the method for obtaining integrated intensities. How fast it is. Concerning my method, it is very fast. Sufficiently fast for trying to extract one thousand reflections, just now, in a few seconds. Both programs have a more or less friendly graphical user interface under Microsoft Windows.