A thorough evaluation of the HP Color Laser Jet Pro M452dn would take more space than is suitable for the space provided here. I will offer a few highlights may be helpful to some potential buyers and HP product developers. For me this product replaces an HP4600d laser jet purchased about 20 years ago. Most noticeable is that a 90 lb. printer is now a 50 lb. printer. The HP4600 errored grabbing sheets about 25 times out of 500 sheets of paper. The same problem has not occurred in the M452dn. The HP4600 would run out of memory space when printing images. This has not been a problem in the M452dn. The image registration errors in the HP4600 could be seen by holding the printed duplex page up to the light. In the M452dn the registration slippage is normally less than 0.02 inches. The M452d system was easy to initialize right out of the box. The first job assigned to the HP452d was to print 125 copies of a six page Holiday Greetings letter on 8.5 x 11 laser jet paper. This meant using the manual handling 125 times to print the second side for each letter. That was okay because it was clear the printer never grabbed two sheets at once. That is interpreted as excellent engineering of the feed mechanism, which is a characteristic of an excellent printer. The M452dn printer rates A+ in performance. There are some questions in my mind about longevity of the printed product. How many years does the paper printed with colored toner last. Might the image be destroyed by storing the printed output in warm or humid environments? Why is there no information out there about the longevity of the page printed with toner? One other thing needs to be reviewed: cost of printed images. The printing cost of my Holiday Greetings letter appears to be $6.00 per copy of six pages which contained 27 images and black text. When determining the net weight of the toner supplied in a cartridge, the result showed an ounce of toner costs more than an ounce of gold. Because of this cost I generally scale back my use of laser printers. It was also a reason I waited 20 years to purchase a replacement laser printer. That is my honest evaluation of the HP452dn.
The 452dn is better at everything over the 451dw except for one thing...printing envelopes. The first envelope out has a ghost print to the left of the real print. Subsequent envelopes are fine. Drivers for Debian Linux are needed to get duplex printing turned on.
Turn on response time from sleep, impressive. print quality B&W and Color excellent. 2-side printing very smooth. THE NEW Toner flat tray VERY COOL! You can always access the color cartridge you want at any time (as they are no longer locked in an immovable drum). And the "Plastic" parts work extremely well with NO sticky plastic feel! Like the bottom paper tray adjusts to paper sizes with no effort , and the manual paper tray is just as good.
We have had nothing but trouble since we got this printer. It does not just print you have to find the magic button to get it to start to print. Also we had the X cartridges for this printer and before we bought it we asked you on line help and they said the X cartridges fit in this printer and they do not so one of the only reasons we bought this printer does not work. I feel you owe me some black cartridges or a refund because we did not get what we wanted.