I have always used HP printers. To me HP printers are the best in the market. I previously owned a HP M507dn, which had digital screen on it. This one that I just bought has a screen with a keyboard on it. This is the only thing that I am not happy about. Otherwise, I recommend this printer which is fast and has a good printing quality.
Previously, I owned an HP LaserJet 6MP, which was simple, brilliant, reliable. This new M507n takes an extremely long time to warm up, and when it goes into sleep mode, it flashes lights and makes beep that are very eye-catching when I'm trying to work. There is no need for the raised panel (which is obtrusive and means nothing can be laid on top of the printer. Print quality is the same, speed is improved.
Printer is great but I hate the software which requires me to pick the printer each time. The printer came quickly. Instructions for getting into the printer functions are only on line.
This printer is perfect for a busy office. The speed is spectacular, the automatic duplexing is a real paper-saver and it performs flawlessly. The main paper tray holds a ream of paper saving us a lot of time. We bought one for the busiest tax accountant (the owner) and quickly followed with 4 more. We bought additional paper trays for each printer.