Customer Rating: 
Summary: Too expensive
Comment: Not enough bang for the buck. Each year I pay as much for the printer ink as I did for the printer. The cartridges are small; so it's not surprising that they do not last long. The quality of the printing is okay, but I think the price should be at least half of what it is.
Customer Rating:
Summary: Ink vs. Printer
Comment: I used to own an Epson 64 printer. It cost me more for ink than it cost me for the printer. Need I say more. This is a much better choice.
Customer Rating:
Summary: Quality
Comment: I have always received new ink cartridges and they have shipped in a timely manner. I will continue to order through this company.
Customer Rating:
Summary: HP 21 Black Inkjet Print Cartridge
Comment: I got this ink for my son's HP Printer. It came on the date promised.
Customer Rating:
Summary: Inked For Life
Comment: When it comes to high-quality printers, HP has made some of the best ones for the past several years, that really continue to thrive. That also continues to go the exact same way for their ink cartridges. The HP 21 Black Inkjet cartridge is sleek and eay to install, unlike older and bulkier cartridges that take up so much space, and are difficult to install. This ink cartridge works mainly on the HP Deskjet 3900 series, and prints great copies of files from your printer. Although you can't buy any refill kits to refill these cartridges unlike other ones, I still recommend this as a must buy if your printer requires it. Ink up, and print out!
Price: B
Convience: B+
Overall: B 1/2+
Summary: Too expensive
Comment: Not enough bang for the buck. Each year I pay as much for the printer ink as I did for the printer. The cartridges are small; so it's not surprising that they do not last long. The quality of the printing is okay, but I think the price should be at least half of what it is.
Customer Rating:
Summary: Ink vs. Printer
Comment: I used to own an Epson 64 printer. It cost me more for ink than it cost me for the printer. Need I say more. This is a much better choice.
Customer Rating:
Summary: Quality
Comment: I have always received new ink cartridges and they have shipped in a timely manner. I will continue to order through this company.
Customer Rating:
Summary: HP 21 Black Inkjet Print Cartridge
Comment: I got this ink for my son's HP Printer. It came on the date promised.
Customer Rating:
Summary: Inked For Life
Comment: When it comes to high-quality printers, HP has made some of the best ones for the past several years, that really continue to thrive. That also continues to go the exact same way for their ink cartridges. The HP 21 Black Inkjet cartridge is sleek and eay to install, unlike older and bulkier cartridges that take up so much space, and are difficult to install. This ink cartridge works mainly on the HP Deskjet 3900 series, and prints great copies of files from your printer. Although you can't buy any refill kits to refill these cartridges unlike other ones, I still recommend this as a must buy if your printer requires it. Ink up, and print out!
Price: B
Convience: B+
Overall: B 1/2+