I purchased a WorkCentre 6515 DNI recently. It is connected in WiFi only. I have one major problem with it : I nearly can't access the Embedded Web Server.
I enter the local IP of my printer in a web browser (I tried Firefox, Chromium and Chrome), and then the page appears only one out of ten times… and it is the same if, by luck, the page displays and so I click on a link. This is clearly unusable.
Every thing else (including scan to SMB or to FTP) works as expected.