I have a Fluke in my tool box collecting dust. Paid $700 for it. used it a few times. Problem I have is the screen is small and when everything is hot it has a hard time giving detail. You have to calibrate the background radiation so the thing your trying to view shows up. if its made of some thing that doesn't radiate heat like a rubber heater hose it wont show up at all. Metal works great. So if your trying to view something in the engine compartment it has trouble. You can set the opacity and get a clearer picture but the small screen size is its limitation.