I bought this printer purely for its A3 printing capability, so the scanner (doubles as a fax) was a bonus. i bought it to replace my HP Officejet K7100, which is a superb machine, but it uses a tri colour cart and my particular printing needs mean that I heavily use yellow, followed by half as much blue and hardly any red, so I needed a single cart machine.
The HP Officejet 7500A seems like a good replacement and ink use looks to be good value. You get the small carts with the machine, which get you up and running, but you really need the XL carts for economy of scale - especially the black as the XL is three times bigger than the standard black.
Print quality is vey good, blacks are pin sharp and do not show feathering. I print out maps onto matt inkjet paper and they result in a really smooth texture, vibrant and no sign at all of any banding or other artifact.
When you select inkjet papers, the machine is slower and puts down more ink (as do all machines I own) but when I used the same graphic onto white inkjet self adhesive lables and used just the plain paper setting, the printer just churned them out and the print quality was as good as when I had used the inkjet paper setting.
The down side of this machine compared to my K7100 is that it does not have a command for booklet printing (or duplex). You can get around this by having the printer do 2 A4's onto an A3 and then manually flip the paper back into the tray and print the reverse side - so on a 12 page booklet, I select it to print pages 12 and 1 (in that order) and then put the paper back in again on the flip side and tell it to print pages 2 and 11 etc etc. it s more time consuming but it is an effective workaround.
When an ink starts to run out the machine advises you that you can carry on running until you think the ink quality drops, but to be frank, once that warning appears, there is not that much life left in the cart.
Photo reproduction is surprisingly good for a 3 colour machine (plus black)with accurate colour and tone transfer.
The machine is fairly quiet and the vibration through the desk is less than my K7100 produced.
Bottom line - very good at most things, does not do booklet printing but there is a workaround and the inks seem to give a very good result but with economical running costs - seems to compete very well against copy shop prices. Buy the machine with a set of XL carts.