Invaluable in an office setting where you usually eat at your desk. I HATED having to warm food up in the lunchroom only to have someone come in my office with an issue and by the time I got back to my food, it was cold again. This changes everything!! Slow eater? no problem - food stays warm throughout the meal! Even my husband who works out of a company truck all day bought an adapter so he could use it in his truck! Game changer! My brother in law even decided he wanted one for hunting trips. These really are the best!!