I have a m11 laser printer. I bought the compatible laser cilinder thingy with a tiger and a green box because hp laser ink is double the price.

So far I have no problems with printing. Aside from the fact that hp puts an exclamation after each print with the prompt: DANGER! COUNTERFEIT INK CARTRIDGE InstALLED!

Ok man I’ll be careful so it doesn’t explode. Only because it’s not the proprietary ink…. Hope I didn’t give them any ideas…