I bought the 1320 4 weeks ago and just LOVE it. I'm no novice to printers, run a small home business and have had a handful of laserjets and Deskjets over the years.
This is a busy time of year for me and this printer has halved by work time. It is fast, efficient and the text is clear. I've just printed 85 newsletters on the double sided mode and can't believe how fast this process was after my last (Brother) laserjet.
I've yet to see how long the cartrige will last but have a spare one on hand after hunting online for the best deal. They were more expensive than expected (£[...]) but so far I've had no wasted pages due to jamming, prints on the scew etc. I even scanned and printed music last week with great results.
The design is attractive in black and grey and it is easy to use the cardboard or thick paper straight through printing. I would only advise not to fill the paper tray as I stupidly did on my first run and the machine wouldn't pick up the paper.
I now have 3 HP printers, all useful in their own way and I wouldn't buy anything else now in the future. I've had the 6L for 7 years and it is still going strong while I finally took 3 old other makes to the tip recently.
I'm sure you won't be disappointed if you purchase the Laserjet 1320 although I believe they are hard to find due to a new model replacing this machine.