I have one these, one thing I would mention is I am not getting anywhere near the copy count from their "high capacity" toner cartridges that they estimate, 2,600 copies.
I just ran out of toner the other day, my current page count is 2,009 but that also includes the lower yield cartridge that the machine originally came with.
Maybe estimated page counts are like the EPA's gas mileage numbers but it is still disappointing.
-KeithP
Yes, the "high capacity" ones are a rip. After trying twice and getting MAYBE 25% more pages than the standard toner cartridge (for almost double the price) I have decided to stick with just the standard cartridges. I have gone generic a couple of times, but really the authentic Brothers are quite reasonable at $45 (and I don't have to pinch pennies since I'm reimbursed for my supply costs).
I print around 1000-1500 legal-sized pages a month through this printer and generally buy a new cartridge, I would say, roughly every 3 to 4 weeks. I have bought one replacement drum unit (which is, ironically, pricier than the entire printer, and still pretty expensive even from the generics on the Internet). Drum unit replacement is recommended at 10,000-12,000 pages printed, IIRC. There are lights that blink at you irritatingly when the drum or toner is to be replaced.
Usually I can get about 50 more pages out of a cartridge when the toner light starts blinking at me (before the prints start showing noticeable light areas), but it's definitely a signal to head to the office supply store and have another one ready.