I need not say much about the device itself, the others have done before me and I can only agree. I'll just briefly explained how the device fails on OSX 10.5. Print, Scan and Fax transmission works perfectly, the MFC is connected to an Airport Extreme via LAN, the installation of the driver and the software is fast and without problems of equip, however, it is recommended not to use the software on the CD, but will to load the latest version of the very good Brother website. What is very important for me in the equipment that you can scan to a memory card without a computer it to his needs. This also works perfectly regardless of whether USB flash drive or SD card, the other cards I have not tested. The pick of the scans of the cards via LAN but does not quite as described in the manual, with Safari or via server connecting with ftp If that does not really. However, this is more like Apple as the printer. With the free FTP program Cyberduck folds but read the card via LAN properly.
I really recommend the MFC-5490 and who do not need WiFi or color display can confidently dispense with the expensive products.