HP CE710-69010 - Unité de fusion

Very very annoyed with this printer. Sure it'll print regular sheet paper quickly. Anything through the manual feed tray is thinking thinking thinking in between pages. It is taking my 1 hour to print 100 pages through the manual feed tray. This printer is basically useless to me. Sucks that my job is 1600 cards front and back. I'm pulling all nighters to get this job done, because HP said this printer was fast. I'm not done with 1 job and already getting error messages. 1 positive - Indexing is stellar. 2nd positive - had epic tech support help with the setup.