Lidl does sell a decent range of fresh veg, as well as good cheese -- I cook fresh food pretty much every night and have shopped at lidl in the past for this purpose. Am lazy now and get me lovely organic veg delivered however.
I have seen these advertised for a while and I am a bit (a lot) sceptical. But, if there is a real reason (as opposed to a con) and they do work then I will get them - I spend loads on detergent and would be happy to buy something better for environment and lighter on my wallet.
I don't know how it works, just that it does work. They provide a stain remover stick for any really vile stains, but they do the rest of the work, definitely better for the environment, pocket, and possibly the washing machine where the drawer does not get blocked with nasty stuff.
Lidl pay their staff at a much higher rate than other supermarkets, their olive oil is good and cheap and they also have an area where you can pick up industrial angle-grinders, abrasive wheels and the like, at a very good price - should you feel the need.