I bought a MF644cdw a few weeks ago, set up a wirless network, and it's been a nightmare ever since. The printer's internet signal is "good." Both my Mac and my windows machines recognize the printer and try to print to it; but 80 percent of the time. the print job just hangs endlessly with no action. This includes simple jobs like printing a test page.; forget about printing PDFs -- useless.
Anyone having similar problems? The machine is driving me nuts.