PlateJoy rocks. Food is a crowded space, but PJ is pretty different. Fans food on wheels startups are satisfying when you're in a hurry, but they aren't great for you and you get sick of them pretty quick or if you don't want to feed your kids fast/restaurant food every day. On the other side, grocery delivery let's you make great good, but you have to do all the work of putting together the recipes, ordering the right stuff, etc. PJ is great because you tell it how you want to eat, it gives you recipe options, and you get all the right stuff. It even works if you're not a good cook. Definitely give it a try.
Note: I'm a very happy investor as well as customer.