I just love this program.
I had older version 2.5.0 working fantastic. Due to rebuilding of my machine, I have reinstall it - but when I installed the latest version (6.7?) it just hangs and never prints. I was trying to print an excel file into pdf (Which I did before with older version of 5.2.0 and worked very well). The pop-up of "Printing" stays forever and then it says (Not responding) and eventually it crashes the excel as well. So uninstalling it. If I find the older version 5.2.0 - I will try installing it and will see whether it still works else no option but say "good-bye" to pdf24 and use the other old one Primopdf. However I found in past that pdf24 was providing better pdf quality than primopdf. Will try luck once more.
I have had a great experience with PDF24. It's FANTASTIC!
Ugly as pig, when it comes to the UI. Constantly crashes ghostscript executable. Other than that - when it works - it does the job... (Running on a 64bit Win8 PC)