I was originally pretty skeptical about these cartridges since there weren't any reviews on them. I checked ebay and these were about the same price. Because I trust monoprice over ebay I bought my cartridges here. So far I've been very happy with these.
I use my printer to print photo catalogues so I tend to go through ink very fast. These cartridges last a very long time and the print quality is identical to the OEM cartridges that came with the printer.
I highly suggest these cartridges and will order more soon!
I actually ordered enough for both printers. As far as I can tell (without going through an elaborate testing process) everything works as expected. The only thing I don't know is how long the cartridges will last, and if there will be any degradation in quality over a short period of time. The big plus is the cost. Dell charges about $55 for a cartridge and Monoprice charges considerably less. I can order 3 cartridges from Monoprice for the cost of one Dell cartridge.
Works with the Dell c1760nw, c1765nf, and c1765nfw even though they are not listed on the item page. I took a gamble (Dell toner lists the same models on their cartridges) and once the toner arrived it has those three model numbers listed on the package. Replaced my yellow cartridge and it works perfect and prints great.
PROS: Works great, prints like the original Dell toner.
CONS: Kinda cheap plastic, but what can you expect from a toner that is 1/4 the price of a new Dell one.