A superbly versatile printer, with awesome print quality. Expensive, yet economical.
But, while it will print out of the box, once you get into exercising its extremely varied capabilities, there is a learning curve and sometimes call or two to tech support. Funny thing is that I know my printer better than Tech Support, but I still have a thing or two to learn from them.
For example, I have 4 trays plus by-pass (total 5 supply sources). I use the bypass (Tray #1) for #10 envelopes (holds about 8-10), Letter in #2, Premium Letter in #3, Tabloid (11x17) in #4, and 9x12 envelopes in #5. You can change these, but you will want to dedicate a few or all pull-out trays to a size you use regularly. Trays hold a ream of regular paper. The bypass tray will handle up to 12.6" in width, and length longer than most anything you can buy.
Envelopes MUST be fed flap first, or flap to front or back. Sometimes you have to invert the printing (rotate 180°), or it will print the envelope upside down. Originally I had to re-select the rotation every time I printed. With one of the upgrades a Tech installed, the printer now remembers to invert, and it requires input only when I use a media with unfamiliar dimensions.
Fixed trays (2-5) print on top, foot-first. Bypass tray (#1) prints on bottom, foot-first (unless you invert, which you will need to do for envelopes).
Introducing a new media (i.e., new size) is a challenge, and there doesn't seem to be a good set of instructions. I experiment with the PRINTERS option on my Windows 10 computer, as well as the PRINTER TOOLS on the printer itself. Once the printer has learned the new media, it remembers, but it's not exactly the best student.
Regarding "expensive, but economical", a set of toners will set you back some $1,500 (retail through the concierge service and a bit more expensive than you can get discounted on-line, but concierge service is equivalent to an unlimited warranty, so well worth the extra cost). So expensive, but the cartridges seem to last forever. At well over a year, I may need to replace the original cartridges in a few months. Beats the heck out of $200-400 every few months.
If you don't know the difference between an Ethernet Port and a USB Port, you might want to consider a simpler device. But if you're tech savvy (or reasonably so), you want superb print quality and versatility, and you're patient enough to learn how to use it, the Xerox 7800 (and I recommend the gx with four pull-out trays) is hard to beat.
Did I mention it prints on very heavy stock (be sure to get the extra thick media upgrade – cheap and easy to install)
And unless you work in graphical arts, you don't need the Phaser Meter.
For drivers, consider getting both PS (PostScript) and PCL6. You can change the media sizes in trays through the drivers, but you have to reset the sizes in the printer (WIndows Control Panel – Printers and Devices, and also on the printer's LED Control Screen). I use mostly PS, but when I want to print a 9½ x 12½ envelope, I use PCL6 and change the settings for the bypass tray or Tray #5 to accommodate.