For me it's a big "blech" to Lean Cuisine, but to each his own!

Something I haven't seen anyone mention is the sodium content -- check your boxes and prepare to see some big numbers. Also, the sugar grams are often high. I totally get the convenience factor -- but I think the Smart Ones are often a little better. I've seen the ads for the new South Beach frozen meals, and would expect those to be a step in the right direction -- but I haven't taken the time to look, so I don't really know.
I suppose for a quick fix you could do a lot worse than a Lean Cuisine with a big plate of veggies on the side -- but if your other meals aren't a heck of a lot less processed, these meals are not a super healthy solution for the longterm.
I'm on disability for a couple more months, so obviously I'm not working -- but when I was working 50 hours a week and had plenty of other demands on my time (including an hour of daily exercise,) I did batch cooking, preparing all my lunches in advance as well as a bunch of staples like brown rice, chicken, turkey chops, etc. With a little investment of time on a weekend morning, I'd be all set up for the week so I'd have healthy, homemade lunches and dinners -- with like 20 minutes of cooking time in the evening, if that.
It's like anything: if you see the value in it, you make it a priority and figure out how to make it happen. But of course, you may not see the value in it that I do!

Or it just may not be a big priority for you right now. If that's the case, then I guess the LC meals are better than some other quick solutions.