Do you like how Heater Meals taste, or do you tolerate them for the convenience?
I like MRE's, but they are expensive and are much bigger meals than we want.
It's somewhere in between. I wouldn't choose to eat Heater Meals as a real meal, but they don't taste bad. I don't choose frozen tv dinners as real meals, too. What Louise and I rely on them for is meals during dust storms. Louise has hypoglycemia and can't go without a meal. If there's a playa wind storm, and we can't light up the camp stove, the heater meal is a legitimate meal for Louise (and me). (A note: heater meals have a shelf life of some years, so we go ahead and eat them at home as they approach and exceed expiration so we don't waste our money - they're taste is acceptable as is, and you can use your own condiments to add whatever additional flavor you want.)
MREs are made for soldiers in combat, and the MREs I've read the labels on provide pretty much a full day's supply of sodium, fat, calories, etc. in each meal. At our age, we can't afford to consume all that stuff then have two other meals a day. For many Burners, MREs would be a perfect fit, though, especially if they're operating 24 hours a day on that one meal.
The alternatives I've seen suggest it here all work, but if we're in a dust storm when it's meal time, Heater Meals can give us a hot breakfast, lunch, or dinner without having to light a fire and without sun on the dash.