What would you like to know? I drive one for Package. They do have a 600 mile range. They are incredibly quiet. The air compressor makes more noise than the engine itself. We do not use CNG, our tractors are LNG. They do not pull as hard as a diesel, but they're not that far off the mark. When going down the road all of the lines on the back of the tanks build frost/thick ice all over them. Even in the hottest weather. It takes roughly the same amount of time to fuel one as it does a diesel tractor. You will have to wear protective goggles and gloves when fueling. LNG is -243 degrees Fahrenheit. It's actually a very safe fuel when compared to gasoline or propane. You can put out a cigarette in LNG and it will not ignite. It has a flash point of 1000 degrees Fahrenheit. If spilled on the ground it evaporates. If left in liquid form at ambient temperature it will actually start to boil over and eventually evaporate. Doesn't matter if it's -20 below zero, it's still much warmer than the fuel itself so winter weather will not effect it's operation. Throttle/power on and off is a little "jerky" when compared to a diesel. When letting off the throttle it creates what seems like a "Jake Brake" effect for just a split second. Takes a little getting used to, but once you do you don't notice it anymore. Hope that helps.