Trust me, you will be amazed. Like me. I checked the system a couple of times, because itīs new on my car (since last friday) and I want to know if it is efficient enough or not. To be honest, I was driving like a mad man yesterday morning after the Autobahn run. When I arrived home, I opened the reservoir and put my finger into the water my first thought was: "damned something is wrong, the water cannot be that cold" But everything ok. :-)