Had em just a few years earlier in NJROTC and a few years later at USNA - actually liked em. Prefer over MREs just due to the overall volume, though I understand the desire to limit the weight that MREs give you.
Had I opened the C-rat and found anything else, I might also have a found memory of them. But C-rat Ham-n-Lima Beans is more than any human should have to bear. IMHO.
If they were the only food around, the rules would be different of course.