Something not noted in the linked article is that all three let you select your 3 or 4 meals from a wider menu with at least 6 choices. So if you don't like sweet potatoes, as someone noted here, you could usually avoid them.
The linked article ends with what is probably the most common knock on all these companies: the uncomfortable feeling that the packaging is a huge first-world-privileged waste of resources. For example: if a recipe calls for balsamic vinegar, there will be one little plastic bottle containing 1.5oz of balsamic with a twist-off metal screw cap and a tiny label. Or there will be three, one-Tbsp tear-open foil packets of soy sauce, or exactly two green onions in a zip-lock baggie. And so on.
All the companies will claim with marginal truth that all the packaging can be recycled. The little plastic bottle goes in the blue bin. The baggies go in your plastic-film bag (if your recycler takes plastic film). You break down the big cardboard box and fold that into the bin.
But for temperature control the box is lined with an insulating blanket. That's usually a "space-blanket" type foil and plastic thing that is not recyclable, or else it's an inch-thick paper-and-jute blanket that you can put in with your garden-trimmings green bin.
And the freeze bags! Two or three plastic bags of frozen gel. You have to drop them in the bathtub and let them thaw, which takes hours (they are very effective), then you can cut them open, pour the gel into the toilet and flush it, and only then put the deflated bag into the plastic-film bag for recycling (if supported).
That's a lot of work to assuage first-world-privilege guilt. It's the main reason we finally gave up on the real convenience and interest of the meal services.