the cool thing was that if you did not bring a bag, you have to pay for a fairly sturdy plastic bag (varying prices for different sizes i think - also very european). i saw several people leaving with their groceries in bags and i wonder - will they bring them back and reuse them? will they think twice because it cost them? i hope so.
all and all i think it was cool - but i don't think i'd want to go if i was shopping for something very specific. but if i was picking up random things like sides and pantry staples and random meat and frozen stuff it was good (nice cheap grape tomatoes too).