I have done 3 refills on 305 inks for HP and they work just fine. Of course, the "Low ink" error does not go away because it has to do with the counter on the ink chip. You just ignore it and print normally!

Excellent. Of course, be careful not to run the printer head empty because it will get damaged. So as soon as you see dashed lines, stop printing and refill the head. You can do this about 5 times. BE CAREFUL when refilling the color head, which is divided into three parts with different colors. The HP sticker has the edge colors REVERSED, so you will mix them up. SO READ THE INSTRUCTIONS and place the set's sticker on the head to fill the colors correctly. Finally, suck a little to unclog it. IT'S WORTH IT

It is a very good way of making the ink last, we live on a Greek island so in the heat we would purchase 3 sets a year so this is a great way to save money. I would recommend looking on YouTube to see the method of refilling, you must do a set of things in the right order, its easy to do but you need to the tasks in the right order.

I received it today and I am quite satisfied. The packaging is excellent, high quality, and everything is well organized in bags (syringes, inks, base for the container, etc.). It includes detailed instructions for filling both inks. I started only with the black (305 HP Black) where I followed the entire filling process. I tried the cap and saw just a blank white page. That’s when I realized my mistake. I proceeded only with the filling without doing the head cleaning with the special solvent included. I prepared warm water and a 1/4 ratio to clean the cartridge head from the dried ink (it’s in the instructions with a photo) and tried again. Excellent printing! The only downside is the low level ink warning that doesn’t change... a minor issue. Very satisfied for now.

To me it works perfectly. The printer keeps informing me about empty cartridges but continues printing.

From a certain point onward, the ink cartridges run out so quickly that you are forced to buy new ones

well. in the picture there are bigger bottles and I thought I will get those but I got 20ml or 30 ml I don't remember I suggest them changing the picture because the bottles show bigger in reality.

I tried very carefully with all instructions on the product and youtube. But the printing was not very good and quickly finished.

Very good and economical. The kit you need for unpacking is narrower for hp304 but with a little more pressure it works. Be careful because the inks are 20 ml and relatively small. Of course, they are enough for many uses. I recommend it for starters. Later, it is better to buy larger bottles

The ink is good, in best quality it takes a little longer to dry, the clip to pull the air is hard but it does its job, it has very good instructions for beginners inside the box.

The inks are excellent, just like the genuine ones! Complete ink kit for refilling the cartridges, with filling instructions and very easy to use. It's worth its money and more!