HP (Hewlett-Packard) C9351AN No. 21 Ink Cartridge

Typically good quality, but the expiration date is a...

Strengths: Typically excellent HP print quality.

Weakness: These HP cartridges have an expiration date hardwired into the component.

You cannot install an "expired" ink cartridge into a printer, even if you want to do so and even if it is been kept fresh and unopened. Therefore, you also cannot keep a backup ink cartridge (unless you go through ink quickly.) There is a class action lawsuit against HP right now as a consequence of this immoral practice, which forces you to dispose of ink cartridges that you have purchased and...

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Its not worth the price

Strengths: I won't argue that the printing quality is poor, the prints are nice.

Weakness: Very expensive for a mere 120 some pages.

I was so sick of spending money for these cartridges that I upgraded to a laser color printer for 300$. I am a college student so I shouldn't have a lot of cash to waste right? Well upgrading to a laser printer was a smart move - precisely because this inkjet stuff is too expensive. 2500 pages for 50 dollars on a laser versus 15 dollars for "150" pages on an inkjet. At 20% the cost I quickly...

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HP 21 Black Inkjet Print Cartr

Strengths: Prints about 150 pages with one cartridge.

Weakness: It costs about $15 per cartridge.

It prints about 150 pages with the cartridge. Which makes it great a cartridge. It produces great pages and clearly printed pages. I recommend the printer which uses the HP 21 cartridge.

HP 21 Blank Inkjet

Strengths: Great quality ink

Weakness: Expensive for amount of pages it prints

I bought this from the HP website and they have free overnight shipping which is great. HP has great quality ink so there's no complaints. It was packaged in a box and brand new.

great service

Strengths: always a great product

Weakness: price is high for number of pages printed.

It is a great product. It could use a lower price. They store well as in original packaging. Refurbished tend to dry out. I like the directions that come with printer on installing.

HP Cartridge 21

Strengths: Good quality

Weakness: Nothing to complain!

Excellent! I am very satisfied with with its quality. I've been using it almost 6 months now, and I print out a lot but the cartridge has a long life!! I will definitely order from them again.

Very good

Strengths: Print quality is very good: Clear print, no stains on paper.

Weakness: run out of ink faster than expected.

I bought this one for my HP F380 All-in-One Deskjet to change the old one that came in with that all-in-one machine. The print quality is very satisfactory: the print is very clear with no stain on it. With this Deskjet, it runs less noisy than another old Canon one in my office. Combined with the HP 22 color ink cartridge, it makes good prints and copies for me. And it is easy to install it:...

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Typically good quality, but the expiration date is a...

Strengths: Typically excellent HP print quality.

Weakness: These HP cartridges have an expiration date hardwired into the component.

You cannot install an "expired" ink cartridge into a printer, even if you want to do so and even if it is been kept fresh and unopened. Therefore, you also cannot keep a backup ink cartridge (unless you go through ink quickly.) There is a class action lawsuit against HP right now as a consequence of this immoral practice, which forces you to dispose of ink cartridges that you have purchased and...

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hp 21 black inkjet printer cartridge

Strengths: very easy to put into printer and great results

Weakness: none

I am not very handy with printers but I did not have any trouble taking out the old cartridge and installing the new replacement cartridge form HP. I only trust name brands as I know they stand behind their product and I have never had any problems with them.

Money Down the Drain

Strengths: Print quality is good using black ink, even when using "draft" mode to print. Never tried to print anything high-quality with the color, so can't really say.

Weakness: Cost and frequency of replacing cartridge. I ususally print everything in "draft" mode just to save ink, and even doing this, I get about 100 pages per cartridge.

I knew that there had to be a catch when I bought the printer (HP 3930) for only $30, but I didn't think I would have to replace the ink cartridges so much, when I print so little. I've had this printer for a few months, and I've already had to buy 3 cartridges (see "weaknesses" above). If you're looking to buy a printer, great job checking this out before you purchase. Don't buy a printer that...

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