I own this microwave for 2 years. Although whirlpool face a great competition in today's market. But believe me that this microwave is really good. We use it very roughly several times a day and till date it have never given us a problem, except the one time, it's fuse blown off which I think is not the appliance's fault, it might be due to electricity fluctuation.
In this, we have grilling options available to cook the tasty grilled items. And a option is available that is said as keep warm, it is to keep the food substance's heat constant for the duration. And it's heat is not increased or decreased.