PROS: This is the third replacement black toner cartridge I have purchased from Monoprice for my Samsung SCX-4521 printer. The last two worked perfectly and were only a fraction of the price of one from the electronics stores. Monoprice has been a good place to shop.
I use these toner cartridges in a Samsung mono laser printer model CSX-4521F.
I don't keep an actual page count on the total number of prints I can make out of one cartridge but I seems to be a lot and this refilled cartridge is certainly a lot cheaper than buying a virgin one. Definitely a worthwhile purchase.
PROS: I have not actually used the laser toner cartridge I just received as yet but I have used this same model twice before with excellent results so I expect that this one will be just as good as the previous ones. I have ordered products from Monoprice a number of times in the past and have always be satisifed in the past. UPS had quick delivery.
Got cartridge, put in printer, got nice black text. Better output than the cartridge purchased from a worldwide cartridge store that cost more than twice as much! I will be purchasing my future toner cartridges from Monoprice again.
I have purchased several of these replacement toner cartridges for my monotone Samsung laser printer and so far they have been very reliable and long lasting and are only a fraction of the cost of a new cartridge. I figure if one does happen to fail and ruin my printer the cost of a printer has come so far down, I am willing to take the risk. If such a failure should occur I would take another look at buying these.