Purchased this for myself and 2 friends at work. We love them! It’s an incentive to take homemade food to work. Plug it in at your desk in the morning and the food is nice and hot in a couple of hours without letting any smells out until you open the container. Depending on what you take, you can also prepare a side salad to accompany your hot lunch. 
If you’re home, you can set it for when you’re doing chores and your food will be ready when you are. You can also set it up to keep food warm for your spouse or children if they’re not going to be home in time for dinner.