For weight carried freeze dried and dehydrated is best, but having 1 or 2 MRE's broken down into their components for fast and easy eating can be good. From my experience I've had C-Rats, and all were okay but for the lima beans (even had a couple of the old K-Rats..ugh!!). Had some 80's MREs that got stored in too high temps and spoiled but that was the only time of serious gastrointestinal difficulties. The 9o's stuff through the present isn't bad, some I prefer some I don't but that's a matter of taste. The old C-rat chocolate always seemed to me to be some form of sup'd up Ex Lax to me for a while but then the body adjusted. In extremely general terms I think the French MREs today are the best followed by the Brit and German issued stuff, but the US MREs are easily palatable. Thing is, if you get one handed to you and don't get to choose what it is and can't trade for it, it's often no different than regular table food - if you don't like X regular you won't like X in an MRE. Other times it's mood and what the stomach can handle. I don't do well with stroganov and some tuna dishes on a normal day. On a rough day in the field where the stomach is being picky as to what it can handle or can't, being stuck with such in an MRE, C-Rat or anything else becomes a major decision of 'eat today or not, that is the question'. Then again, if a meal package is too much for you, you can save up the crackers and cheese or peanut butter to chow down on in lieu of the entree. When I could I'd strip down a case of the MREs and pack the individual contents to suit needs, taste and weight constraints.