Micmak, it really does depend what sort of food you like - and I would go to Aldi (which is related to Lidl) many times before I would set foot in our local cr@ppy ASDA.
We love the German cold meats and prepared salads from Aldi - their veg is always fresh and cheap - I use their washing powder, their cranberry juice is better than anywhere else, and in the summer, their version of Pimms (Austins) you can't tell the difference and it's half the price. Their frozen Christmas meats and fish are superb - we had the three bird roast and the salmon last year, excellent value for money.