Summary: Had this for 4+ years and as time goes by the equipment starts to show its ware. Scanner quality certainly has gone down. Copy has also gone down. Fax still works. I recommend this for light use only home or office. Don't by it used buy new.
Summary: It's a hunk of garbage. It has been unreliable and touchy since I bought it. Double feeds paper, jams, and so forth. I even had it "repaired" by an authorized Canon outlet, which didn't fix the problem at all. I have updated the firmware, updated the drivers, paid to have rollers replaced... Everything to no avail. Pass on this and all other Canon products, if you ask me.
Summary: We have had the MF5750 for a few years now and it has been a good reliable machine, with the one quirk that the paper output tray doesn't catch legal size paper, so it ends up falling all over the floor. However, we have modernized our operating system, and moved to Windows 7 64 bit. Now the scanning function doesn't work anymore. I had to go to the Canon website and download updated drivers for the printer, which went pretty smoothly.
Summary: The copier and fax machine are just great. The scan feature cannot be fed from the top feeder :(. Other than that, it seems to work great. Fabulous item for the price! Works as well as higher dollar items that do the same!