We put them on our squad cars years ago to reduce costs for repairs due to squad car/deer accidents. Though they did reduce the costs substantially, there usually was repair work that needed to be done, both to the squad and the grill guards. Depending on how fast you’re driving, and how heavy the deer is, the guard will flex backwards, and can punch out the plastic grill area. Sometimes the guard bounced back to the original shape, most times not. And yes, mechanics do hate them because they have to reach further when bent over the guard to do their work….”Hard on their backs!”