Pixel defective after two months and shadow spot
After 2 months of regular (but not intensive) use, 1 defective px appeared (1 sub-pixel out of the three works, fortunately it's the blue one) and a shaded spot further away, very visible on a light background of a few px (body behind the matrix).
The policy at Acer regarding this type of defect is not very engaging, which is a shame considering the price. I was hesitating to buy Acer, but I won't be asked again!