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!