Its clear to see the grease being stopped by the Shepherd Filters. We also are finding the frames are very clean when we change the filters, so there is peace of mind that most of the grease is now being stopped from entering our kitchen exhaust system. We anticipate cost savings and the reduction of servicing our ESP and ducting systems. This has been great for us due to access issues and previous experiences cleaning the ducting. Our staff have found the filters quick and easy to change when it suits them. We are very happy and this is the right solution for us.