Not very sturdy. The 4 wood slats that come with the bed are so flimsy they fall apart looking at them. We bought an additional frame to go under the bed on either side just to hold up the mattress. This only gets 2 stars because it was so easy to put together... probably because it's only about 3 pieces. We paid extra for the "expert installation" which never happened. The company that delivered the bed said they don't do that. Luckily we did get a refund on that.