Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Product

I do allot of refilling and this thing is great. You don't spill any ink, it distributes it evenly in the cartridge, and it's easy to use. The ink is great too, colors are what they should be. I own the black system and it looks great too. Remember, don't let the cartridge run bone and let it sit empty for weeks on end.Also of interest is the rubber stopper in the bottom of the tank. I have other kits that just came with needles and tried refilling this thing. At first i tried putting it back through the needle and it was kinda slow. But you can put a needle through the clear stopper and it works perrrrrrfectly to refill the refill.Buy this for every brand you ownPS(also works on other cartridges not listed on the packaging but watch out for where the colors are. The needles may fit but the colors are in different places!)