For a heavy-duty hole in a granite tile, it is good but with a lot of effort and water because it gets burnt!!!
Maybe there are better options!!!

Very honest for its price. It drills bricks and walls effortlessly... the only difficulty is with beams where you need other tools for deep holes (pneumatic drills, SDS drills, etc). Be careful with granite! Yes, it drills through it, but there should be no impact because you will damage it! A little more patience and without impact, it will drill through granite just fine.