(There's an easily-found way to reset toner counts, for example, and get anther 25-50% more pages from a cartridge. Although I no longer use it as running out of toner mid-job is a hassle. The toner is cheap enough, and long-lasting enough, that I happily set-and-forget with their auto-order system.)
The only thing that's bothered me about them is they're making it harder and harder to figure out how to return toner cartridges for recycling.