I've had major issues after going from my 3880 to the P800. Main one was the inability to print to 17 inch wide paper and get a complete image, even though the gui showed everything correctly. The black inks are also different, so older profiles perform differently. I reported this some time ago and received a sort of acknowledgement, but have not seen any new fixes. I haven't checked recently (gave up and just used Epson ABW); maybe there's a new version of QTR. Had been using QRT for many, many years prior :(