Assembly  was a little tricky but got it done. At nighttime, the baby sleep  close to our bed. With this bassinest have a mesh, it is  easy  to monitor the baby  at night and to make sure the baby  safe sleep to reduce of SIDS.  The mattress is a little thin, maybe to prevent from SIDS.I love how  it tucks under the bed to prevent you from tripping over at  night when you can't see.  The height is adjustable to fit different bed heights or even under a couch.  Good thing is portable because it Glides smoothly on hardwood floors and onto rugs. Pretty sturdy.  Very good start off to sleep before they get into the crib.  Highly recommend.