Bed came with only 3 slants/planks for mattress. Not very sturdy. Comes in separate boxes (3). We thought we didnt receive rest of slants, called Wayfair and they sent us a replacement. So we used extra slants from 1st bed for extra support. Also, instructions are hard to follow and its for full/queen bed which looks totally different than what the twin is. 

Happy with it now but was annoyed with lack of slants and support. Luckily Wayfair worked with us and service was great.