Very disappointed about this product. Totally useless. It took us 9 hours to install the whole thing as the instruction guide was very unclear. 
After installed for one day, the middle part of the upper and bottom board started sinking. There is no way we can use it. 
We filed a complaint to Wayfair and they denied to give us full refund. Wayfair only gave us parts for replacement which is useless or partial refund of 100. 
We would strongly not recommend to buy this product.