I bought the Mac compatible version of this product and was sorely disappointed on many levels.  Although the instructions are explicit and easy to follow, the procedure didn't work.  I had to install the software first and then hook up the cable.  The software was a breeze to install, and my laser printer did work.  But it cut the print quality from 600dpi down to 300dpi.  It also slowed down the printing process, hanging up after printing a mere two pages.