Summary: I did a search for the best deal on toner for my new Brother HL5250DN duplex printer (which is sooooo awesome, by the way) and found it through Pricegrabber.com. I LOVE this website!!! Buy.com is the BEST place to buy toner - best deals, not refurbished or OEMs! All manufacturer originals! Anyway, I highly suggest getting the high yield toner vs. standard. But in my situation, I guess because I primarily use this printer for duplexing, the high yield toner didn't seem to last very long at all. In fact, I wrote down the date I put it in and the date it ran out and it was only 1 month and a few days time. Like I said, it could just be because I'm duplexing so much. Well, that's my two cents. Hope it helps you.

Summary: Over years, I have used many different Brother laser cartridges with their MFCs and printers: TN460, TN540, TN350 and TN580. All were high quality and long-lasting. My brief experimentation with compatibles - even brand names - left me underwhelmed as they dropped blotches of ink, smeared and didn't last as long. In short, the upfront \"savings\" were short-lived. Furthermore, Brother provides labels to free-ship the cartridges back to them for recycling - a nice touch. My only gripe is that they tend to change their drums and cartridges with every new generation of printers/MFCs. Other then that, I recommend genuine Brother cartridges, including TN580, highly.

Summary: It's taken me awhile to write this review because, even though I bought the product several months ago for my MFC 8660, my previous Brother TN550 just refused to die. Even after a low toner warning, a shake of the cartridge let me go through more than a ream of paper. The new cartridge, which is supposed to last even longer, certainly prints well, and I can only hope the drum unit lasts as long as advertised. I had an older Brother laser printer which was also a beast, but I'm not so impressed with their inkjets.