I bought 4 shelves, 2 x 40cm and 2 x 60cm with inverted brackets and all 4 shelves are slightly bowed or rounded on top so the items kept on the shelves don’t sit flush with the shelves which is disappointing. Quality of brackets is excellent but the 3mm drill bit broke inside the shelf so I had to hand screw the screws in underneath and it was very difficult as there were lots of knots in the wood. Couldnt get some screws in at all. Happy overall, they do look great. Spoke to customer service and they offered to send me 4 new shelves so very good customer service in the end.