My kids are LOVING their new bunk bed (8 yr old on top bunk, 5 year old on bottom) stairs are sturdy enough for me or my husband to walk up to tuck in at bedtime. Storage cubbies are filled with books and dolls that are now off the floor-- fantastic purchase would definitley recommend. Have stanadard twin mattresses on both, still need to get a trundle mattress. I purchased assembly as well and the third party company was fantastic-- contacted me right when my order was placed and they came a few hours after the bed (in all its boxes!) was delivered & The bed was assembled in 3 hours!