I rate this software just because it supplies wider coverage than the System Profiler.app. I noticed there maybe excutables in the .app with different compile options(some of them only for i386). Also another good thing is it can deal with libraries. This is quite useful for me with my self-comiple libpng. I noticed the 19 limit, although I didn't exceed that number. But I suggest the developer to combine them. Looks like, the pro version is based on another piece of code. And I guess this is why they seperate them.