OK, firstly the installation process. It took me maybe three hours, and maybe a bit longer, to get this printer installed due mainly, but not only, to the various complications of connecting it to the wireless system of the house and HP's ePrint service. HP's on-line Help for the 7510 is exhaustive but difficult to navigate ... the info is there but finding it is a hassle. The Operating and Set-up Manuals which come in the box are, in my view, much too sketchy as is the full Operating Manual which can be downloaded from their site as a pdf. I have been around home computers since 1984 (yes, I'm that old) so I have a fair bit of experience and, eventually, I got the thing working properly. But for someone who isn't at least a bit of a nerd it's not going to be easy.
Once it's up and running it is easy to operate and it gives spectacular results. In all it's functions .... photo printing, copying, document printing, scanning etc ... the results are the best I have ever seen for a home/small office printer. I will willingly live with this thing for the foreseeable future as I am now sure it will efficiently cover all my needs.
My PC runs the XP OS and I use the Chrome browser where I have Google Cloud Print installed. Connecting the printer to Cloud Print was a one click experience once I had the printer registered on the HP ePrint service. It works like a dream from my phone and from my wife's Chromebook as does the sharing facility directly from the Chromebook using the wireless system of the house.
So, in short, I highly recommend this product with the only reservation that the buyer should be aware that plug 'n play it is not.
Oh, one last thing: I looked around a lot for the best price for this item and found it here on Amazon. As usual, once I made up my mind and placed the order on Amazon UK, it arrived here in Italy in 3 days in perfect condition. Can't beat that, folks.