We use the HeatsBox for our daughter's meals. She is 11 months old and it is just convenient that we do not have to take several meal boxes with us.
As sockets are available almost everywhere, heating the meal is then not a problem and also the temperature can be set easily.
But also at home it proves very handy. During lunch naps e.g. you can keep the meal at a constant temperature until our little one wakes up.
On a sidenote: The design is nice, too :-)
Thumbs up from our side!