I tend to avoid Microwave meals purely because the ones I've had in the past didn't taste very nice.
I just tend to make quick meals, usually frozen products that you chuck in the oven so I can't go on about the health side as I doubt what I eat is any better.
Can see where you are coming from though, last thing I want to do when I get home is to start cooking from scratch and making loads of mess to clear up.
I've noticed a few restaurants around here have started to offer delivered meals (not takeaway rubbish) but way too expensive for every night. What I need is a meals on wheels service for young professionals, they always focus on old people but they've got loads of time to cook. Lets get them cooking nice home made meals for us!