Summary: Duplex printing is much slower than I expected. I knew it wouldn't be as fast as single sided but it is much slower. Also thought it shipped with all four high yield toners but that does not seem to be the case as the cyan ran out right after the black and I didn't very little color printing. Over all a good printer but but I thought it would be faster based on the rated speed and have more toner out of the box.
Summary: I have been using this machine for about 4 months and I have to say, this is one expensive machine to maintain. First, the toner cartridges are supposed to have have a life span of 2,000 copies. No where close. The message pops up at about 1,000 copies telling you it's time to replace the cartridges. One quick, shake and you get more life. Then about 100 copies later, the message comes up again.
Summary: I purchased this to replace a Samsung CLP-510 that finally gave up the ghost. It has been up and running for a couple weeks now. I have more cons that pros... 1. The unit seems to be packaged well, and it's certainly heavy, but there was a crease in the plastic front of the paper tray. It's more a blemish to the overall appearance than to functionality, but it's disappointing.