Great day bed.  Its bigger than it looks.  Do not tighten the brackets fully until you have the screws in place.  This can cause misalignment with the pre-drilled holes.  Just go back and tighten them all up when all 4 sides are connected on both the day bed and trundle.  Read some of the other reviews in regards to thickness of mattress.  10' for the top is a must.  The bottom just make sure you are under that.  Its sharp!