I used it on a large strip steak the other night and while I cannot say cooking (grilling) time was reduced as the site indicates, I did have a tasty and tender meal. This model, the meat maximizer w/45 blades and stainless steel posts is NSF certified, and comes apart for easy cleaning. The lifetime warranty is a plus. I don't worry about bacteria on the meat being pushed into the muscle. I generally rinse or paper towel the exterior all meats before seasoning or cooking. Whatever may be left on the surface I refer to as nutritious enzymes.