Let's start with it is a diesel. Any diesel, takes some time to get it's legs under it and working... like stated above. And, when ya wanta turn her off, she will take just as long to cool down. Having said that, if you enjoy boating and have time, it is great and echonomical to run. If you are in a hurry...or, often in a hurry, don't get diesel anything. A great option for those ina hurry, or, often in a hurry is a microwave and an inverter or genset. Or, leave sooner, slow down, as quality takes time....and time on a boat is quality time. You can hurry when you are on land....or, again, use the microwave. ZAP.... OR... just be sure to have both on board. Have loved the wallas cooktop heater, love even more a dedicated wallas heating sytems......and, cook with a slower crock pot on board more often than not. Don't think my microwave has been on board for 18 months or more....but, the blender has. The blender is fast.... :cocktail