We only provide extra quality jet inks, complying with all the specifications of the emulsions involved in the various inks for the various printers. Yes, we will replace cartridges that are defective or damaged or refund you at our discretion. The statistically most accurate answer is between 5 and 10 times that is for a cartridge which contains its own printhead. The same applies to cartridges where the printhead is in the printer and the cartridges are the tanks. A clean printhead is key to a good printout.
Field reports indicate good results.
To be sure, some tanks rely on internal sponges to store the ink and sponges can dry if left unused. There are ways for recovering from a dry sponge and the process is not complicated. Your choice entirely. Ink jet technology is here to stay and learning the simple but valuable art of recharging a cartridge is bound to pay off. No, simply because jet inks are different.