We have two rooms painted with the product from a reputable manufacturer and were more than disappointed. Only after the 4th painting the result was satisfactory. Out of frustration we are then changed about this product and were delight. Not only that, the price is unbeatable, the opacity and has really convinced after 1 coat dark spots were barely visible. For safety, but we are still a 2nd time over it. How does the product behaves when wallpapering we see then. But we are in good spirits.