Very sturdy bed, definitely suitable for adults.  I actually got this bed for my living room to serve as a second couch as well as an additional place for a guest to sleep.  The set up was very easy.  My only complaints are that I wish the back was higher (to better support large pillows since I am using this as a couch) and also the mattress very easily slides forward on the frame and needs to be repositioned regularly (the metal support bars are slippery).