If they truly "remanufactered" the ink cartridges they would cost as much as new ones. What they are actually selling are "refilled" items. They can pressure check the ink bladders inside the cartridges to make sure they are not leaking, but thats all they do. Air trapped inside the nozzle plate at the bottom of the cartridge causes "dry firing" which damages or kills the cartridge. Depending on which technology is used, most small throw away inkjet printers have a cartridge that uses a crystal to fire the ink drops and it is easily damaged by dry firing. Most manufacturers sell the inkjet printers at no profit, they make their money on selling the OEM supplies for them. While the printers can be repaired, the labor rate and parts will cost as much or more as the printer itself. Most die from no surge protection. Laser cartriges are a coin toss too, most local guys "drill and fill" and will call it a remanufactured. The drill and fills are just that, they do not replace seals, cleaning blades or drums. A quality remanufactured laser cartridge done properly will cost almost as much as OEM. Most will reuse seals and cleaning blades which can fail and dump toner into the print engine. The toner can migrate to the fusing unit and contaminate the fuser which will need to be replaced. Sometimes they bind up and because the printer drive gears are plastic, they break. This can be expensive and can easily eat up the "savings" on using the local drill and fills or the cheaply remanufactured laser cartridges. If you demand high quality from your inkjet go OEM, if quality is not a concern, most refills will work fine. If you are using a high dollar inkjet plotter I would not use refills, if the contacts are damaged you can easily damage a carrier PCB. The repairs and price of a new carrier will be very high. If you blow the carrier on your small inkjet printer, you will be shopping for a new printer. Like anything else in life, you get what you pay for.