Hi Frank,
Yes, I use PDF Creator on a regular basis. I have used it for almost a full year and have had no problems. I have not used any other PDF authoring software so I cannot comment on how it compares with others, but for my purposes PDF Creator is great.
I use it mainly for converting drawings to PDF so that they cannot be edited, and so that they can be read by people without AutoCad. I also use it to convert invoices from spreadsheet format to PDF so that they cannot be changed.
I suspect that it does not have all the options that the commercial program have, but it does what I need.
regards
Katmar