The toner cartridges worked well at the beginning, but as printing went on, they started leaking toner onto the roller which then got printed onto the paper and dirtied the printer. I had to remove the cartridge, clean the roller as best I could and re-insert it and then clean the inside of the printer as well. It would only take 15 or 20 pages for it to happen again.

I expected longer longevity. After about 50 prints of text, there is already grey area appears on the prints. Not sure if this is my printer to blame, but I had impression previous original cartridge lasted much longer. I wish my printer has printing count to be objective. However, considering price it is OK deal.

It leave streaks on some of the copies.

Delivered promptly Have not used it yet though it is the second cartridge purchased from them. First one worked properly.

I've purchased twice these packs of four cartridges. The print quality matches the original Samsung cartridges. I have to agree with another poster, something is going wrong with the most recent ones that I've received. As if they run out of toner way too quickly. After 400 copies the print quality is barely acceptable. A typical Samsung one will run closer to 1000 copies, in my normal usage, before showing signs of fatigue. The first lot of cartridges had similar results, and I am not suddenly printing darker documents. Your supplier (G&G) may have changed its own sources, or had some quality problems on specific lots. I see no lot info on the boxes, making it impossible for you to track bad units in your stocks. I hope that they will correct the situation. I'll give it another try in the future, but the deal is less appealing to me.

runs dry much faster than before

Reply by our customer service

Dear customer ,thanks for your kind feedback on our product . The page yield is counted at 5% coverage on each A4 paper . Normally one single unit can print up to 3,000 pages . If you just do same printings as before like just printing normal documents , but got much less pages ,please feel free to contact our customer service for solutions . You can reach them by sending inquiry and online chat ,or calling them at the toll free number 18669797463 (from Monday to Friday 24hours ). Thank you !