I find Lidl staff are very helpful and patient with me, as I muddle through paying for different items with different cards, and the bags always seem to end up underneath the shopping that I need to pack into them.
Aldi is ok but they seem to be more expensive lately, with more big brand items, rather than their own cheaper versions. I prefer Lidl. very good quality, enough choice.
As for the weekly specials, many of the Lidl's I go to are city centre, so too small to have them. but where they do, what serendipitous fun, to go in for rolls and soup, and come out with a blow-up canoe, just in case.... and wonderful work shorts, which have been admired as fashion items !