Hewlett Packard have always been a forefront company for business quality machines. I have been using the 4252 (there is no difference I can find) for 2 years now until I finally managed to break it.
I have printed on paper, card and photo. I use it to scan in all of my charity work documents and duplicate them from the desktop as well as stand-alone. I have not been able to fault it except for two small niggling things.
Firstly is the quality of paper it accepts. If your paper is quite heavy, now I am talking 250gsm quality, it is not brilliant. The paper feeds from the front which means that any heavy paper gets jammed in the rollers as it prepares. Unlike my previous printer this does not have a rear feed for just such an occasion but the back of the printer does pop off when your force in too thick a media.
The second issue is the ink. It does take a black and a colour cartridge which are relatively expensive to purchase as originals. In one shop I found the HP57 colour cartrigde priced at £30(!) although online it is around half the price. The cartridge does last though and my high output (100-150 sheets a week) would still last me 6 weeks or so on draft print settings.
So its not a bad printer, its not the best, can you afford a couple of thousand though?
I am now shopping for my next new one... I am considering sticking with HP for sure...