I've got a Samsung ML-2010 (I think). Bought it in January, haven't had to replace the toner yet. But I don't do a whole lot of printing. Compared to the inkjets I've had, it prints a lot faster, is quieter, and hopefully won't chew through ink the way all the inkjets I've owned did. All I do is grayscale/text, and I'm very happy with the purchase.
Much better than the Epson C66 it was replacing. That printer actually had a damn class-action lawsuit against it because it was so shitty.