Summary: I agree with others regarding operating costs - exorbitant. If you require an actual paper tray (other than the pull down door) it (they) will cost extra. You cannot have a large capacity tray (500 sheet) without also purchasing the smaller 250 sheet tray. They stack and the large one will only stack under the small one. This info is not mentioned in any literature I read. Not cost effective for small business use.
Summary: This printer, though very low priced and good quality printing, is a great introduction to the fine world of HP's Smart Chip Technology. This is where the cost of this printer skyrockets. How this works? Each toner cartridge has a tiny little microchip that allows the printer to keep track of every single page you print. Like an invisible thief it counts down until the day comes where the printer will outright disable printing until you replace the toner cartridge.
Summary: There is no paper tray on the 2550L, and when I went to purchase a paper tray (an expensive accessory) directly from HP, they were "out of stock". Also, the printer oftern makes loud noises when performing internal maintenance (not good to suddenly wake up to in the middle of the night). I've sent the printer back and bought a printer from another company.
Summary: I have had this printer for about 3 months now and have already had to buy a $175 drum and countless toner cartridges. And I don't print anywhere near the maximum output of 30,000 pages per month. I might do 2500 a month. Yes the printer is cheap and prints high quality, but it isn't worth all the extra costs associated with it. And it is very slow if any type of complex document is sent to the printer, VERY SLOW. To upgrade the memory from HP is $500.
Summary: I bought one of these and packed it up to return tonight. There is no paper tray. The only way to feed paper is by opening the front door and sticking in sheets of paper. Then they hang out the front. The paper tray is an option that no one has in stock. I am going to swap for a 2550N. It comes with the tray and is supposed to be networkable.
Excerpt: I wanted to write a review about this product because this printer is my office enemy!! The quality of the printing, once it has finally done the job, is not bad but it does not merit the amount of fuss and noise this printer makes to get the job done! It is incredibly noisy and takes a long time to print even a single page - whethere it is in colour or black and white!