Well, depends what you buy, really. You can buy crappy TV dinner style meals that have the texture of both rubbery display food and mush, and what can best be described as “Reminiscent of having flavor.” On the other hand, for not much more, you can get reasonably decent stuff - it’s no restaurant quality stuff, it’s no home-cooked meal, but it’s certainly edible enough, about what you’d get from a cheap-but-decent diner.
Generally, the rule of thumb is to avoid the shit like the sausages-and-mash-in-gravy or Chicken Kiev in a box, and go for stuff like curries, pastas, and so on. At a guess, since the bulk of it is cheaper stuff, they’re happier to use actual edible ingredients for the rest of it, instead of fuckin’ offal and the vague memory of what a vegetable should be like.
I should point out, Amazon - Fresh or otherwise - isn’t really a thing here just yet, and only arrives in September or so. That may or may not change up my shopping habits, that remains to be seen.