Shockingly EASY to put together!! This comes from a person who does not like putting anything together. However, I took a chance because box springs have become far too expensive. I needed two new box springs for my growing kids bedrooms. I purchased these in queen size. It took only about 10 minutes for me to put one together. Excellent directions. Everything marked beautifully with easy to follow letters. Loved how the screws  nuts were packaged to make sure nothing was missing! Highly recommend!!