Our 3.5 yo likes to sleep in our room and is too long for her crib which has always been in our room.  This is the same width as the crib (crib mattress fits on it perfectly width wise) and is about 10 inches longer so she can stretch out. The high arm acts as a barrier for her rolling out on one side and we put the other side against the wall.  It fits in the space that the crib was previously in.  The storage underneath holds 2 small pillows and a blanket which is great.  We couldn't get a couple of the bolts to line up and it's a pretty hard surface (the crib mattress makes it much softer for sleeping on).