Great twin bed! We decided to upgrade our son from a toddler bed to a twin size bed. Bed arrived fairly quickly, and assembling was pretty easy. I would say less than an hour or so. We initially bought an 8in mattress, however due to the minimal amount of wooden slabs provided with the bed, we noticed the mattress would sink a bit when an adult would sit on the bed. So we went ahead and added extra wooden slabs to the bottom frame and a box spring mattress for additional support. End product and comfort is great! Our son loves it.