I prefer Gousto, as they have a better variety and more choices for vegetarians, although there are usually several meat substitutes which I'm not keen on. Most of the Hello Fresh veggie choices seem to be pasta based, which is not great value.
The packaging is recyclable, other than perhaps the sachets - you get things like tomato puree in a sachet rather than the usual tube, as the ingredients are weighed out. Everything else is paper or cardboard, other than a woolly thing that they use to wrap the ingredients that have to go straight into the fridge. I don't think they are any worse than supermarkets for packaging. I find the portion sizes are fine. We sometimes have leftovers.