This app is good, in that if you can hand it a set of image files, and very quickly combine them into a nice PDF file. Very fast and efficient.
In my case, it didn’t do what I want, however. I have a pile of black and white tiffs. For instance, 10 files that collectively are 350K. I combined them into one PDF (nice and quick), but the resulting file is 4.3mb. I did a similar thing in preview which gave me a file that is 900K, but it doesn’t respect the page sizes. So, neither quite does the job for me. I’m torn between a 1 star in that it doesn’t do what I wanted, and a 5 star because what it does do it does pretty well.