Have bought the device after long deliberation (handsome price). The performance of the device completely convincing. Screws, drilling - with and without impact - all wonderful. However, I have observed under high stress (16 8mm holes with hammer action in concrete) oil or grease leakage. Have the unit returned and the response from the Bosch service was: "After careful consideration, found no fault". That is very unsatisfactory - I'm going to use the device now just continue and hope that it is not just one day after the warranty broken ...