Summary: Print speed and duplexing are great. However, this thing must be the HUMMER of toner guzzlers making it a VERY COSTLY machine. I purchase based on expected print costs and that was a HUGE mistake. Overpriced machine. You can find better printers at better prices that cost much less to operate. Shop around.
Summary: My office recently replaced two aging HP 4650s with these, and the results have not been positive. 1.On one of the printers, the first couple hundred pages are so light that they are not fit for anything except draft copies. The other one still hasn't stopped spitting out pale colors, after a week of constant daily use. 2.If there is a way to print onto 3x5 index cards with these, it's beyond our entire IT staff and myself.
Summary: Firstly, I have been a loyal Dell customer for over ten years. I have purchased computers for myself and my family that are still in good shape after many years, and I (regrettably) convinced my office to switch over to Dell products over the same time-frame. Our Dell 5100cn is the third color laser printer we have purchased for our business in the past four years (it is just over one year old).