I've ordered from Monoprice.com a few times now and I've not been disappointed yet. Each laser cartridge lasts a long time and I do a LOT of printing. Give them a try, you will not be disappointed either. The price of these at Office Depot run around $85.00 each up to $185 depending on the max of copies your cartridge will do. So, the price definitely sold me too!!!
I am now on the third high yield cartridge for my HP Laserjet p2015d and I am completely satisfied with the product. It is easy to install and produces crisp type without extraneous markings. I would recommend this product.