I have bamboo and it's great. I've used it almost every day for nearly a year, and it shows barely any wear. Bamboo is such a hard wood, it holds up really well. No grooves yet. And yes, I treat it every now and then by rubbing mineral oil into it. Basic mineral oil from the grocery store - you are not supposed to use food oils, like olive oil, because they will go rancid. It keeps my board from getting too dried out.