Seems like 4 out of 5 cartridges we use produce dirty prints. Not particularly great when printing out documents for clients to see.
PROS: Cheaper than official cartridges. Monoprice ships fast and easy. Also nice with Monoprice's generous discounts, from time to time.
CONS: Cartridges produce dirty prints. Excess toner on tops of pages. Tried cleaning the cartridge (and other cartridges several times and it doesn't always seem to help. Page counts also tend to be less than official cartridges, but for the price, that's not all that bad.
For a third of the price, I figured it couldn't hurt to try purchasing toner for my HP all-in-one printer. So far, after printing about 100 pages, I can find no difference between this toner and HP toner. I would purchase this product again.
CONS: The drum support bar was not attached on both sides, but clicked easily into place.