It took me 1.5 hour to assemble. No spare pipe, i received one bent. Most of the pipes were having burr on outer edge while plastic connector had burr inside, which makes it very hard to insert and press. As pipes couldn't inserted properly it got some play after full assembly. Cover quality is very poor, torn from edges during assembly. Concluding: Material seems good but design is poor. Could be purchased for 4 or lesser layers but not more than that.