Quality is guaranteed but please be aware these are delicate items. These puzzles are fragile so handle with care. If a puzzle piece does not slide in easily, DO NOT force the piece in place. Try putting the piece in from the other end. All pieces should slide together easily. In the rare event that your puzzle breaks due to a flaw in the wood please return all pieces to me so I can review and make a determination. If the break is due to a flaw or craftsmanship, I will send you a new puzzle.