Only installed this morning (Windows Vista) so not had much use, but great so far. As is so common these days the manual is terse indeed and the documentation on the supplied CD not much greater.
The printer took a few minutes of cycling when first powered up, which worried me but it then settled down.
Did a USB install from disk which took a few minutes but worked with no problems.
I then connected the printer to a router with an Ethernet cable and installed on a laptop in another room. I selected Wireless and the software scanned for and found the printer, then installed. Test print great - job done!
As others have commented the colours are a bit over-saturated but you don't buy a printer like this for photo quality. There are lots options for printing on card, glossy paper etc. which may improve quality if the stock is correctly matched. You can also fiddle with colour calibration if you want.
It is a bit noisy in action (but then so was its Magicolor predecessor).
I bought this printer partly because of the Auto-Off function. Since my wife sometimes wants to print and the printer is on another floor from where she works it would be a pain to go downstairs, switch on, go back, send the job and go down again. The Auto-on avoids that. When Auto-off this printer only uses <1 watt which is pretty good. Here are the figures from the HP site:
295 watts (printing), 8 watts (ready), 3.1 watts (sleep), < 1 watt (auto-off), 0.2 watts (off).
However the Auto-Off function was not enabled on my unit and I had some trouble finding how to configure it due to the paucity of the manuals. In the end I discovered that the printer install puts an icon in the system tray which allows you to select Device Settings from where you can configure the Auto-Off function (for some reason you can't get to it from the printer properties via the Control Panel). The feature only seems to add a few seconds to warm-up time.
From the system tray icon you can also print the configuration settings which will allow you to see the IP address of the unit (I presume only if you have set up for wireless), and the toner status, how many pages printed in colour and mono plus other useful diagnostic info such as dud packets. I have added the IP address to my bookmarks to make it easier to keep an eye on toner consumption, although there is a built in low toner prompt.