This weekend my wife showed me the benefits of using PrimoPDF instead of PDF Creator. While PDF Creator is Open Source, PrimoPDF is commercial but still free. PrimoPDF offers easier controls for the quality of the produced PDF. Both of them, however, tend to leave off bits of complex graphs produced with MS Office. Still, if PrimoPDF’s license allows, it may be a good idea to replace PDF Creator with Primo.

http://www.primopdf.com/
http://sourceforge.net/projects/pdfcreator/