Summary: We purchased the HP Laserjet 400 color M451dn, before that we went through countless All-in-1 printers and this is night and day difference. As a dedicated Printer for our office, this printer is fast and efficient. The yield for black 305A cartridge is 2200 pages we always get at least 3000 pages(lasts about 1.5 months for our office.) before changing it out.
Summary: Had to replace 305A black cartridge after only 1256 pages printed when should get around 2200 pages. In other words, I only got 57% of the printed pages I should have received before needing to replace the cartridge. I'm on the second black cartridge now. It has printed 264 pages and shows 700 more remain. So again looks like will only get around 1000 pages. Like the HP LaserJet 300 color MFP but print cartridges need to be replaced too often and are expensive.
Summary: I use my new laser printer (my first laser) for home-based work and specifically chose one with a higher monthly duty cycle. I needed speed vs. my old HP inkjet and am very pleased with the laser's performance regarding both output speed and (spectacular) print quality. However, the (black) cartridge must be replaced WAY too frequently. I've tried both the 305A and the 305XL, and the number of pages I have gotten out of each seems similar (maybe 500 pages).