Very solid and sturdy after installation. 
The packaging was very secure with more than enough padding to protect the pieces from almost anything in transit. 
I highly recommend using your own 1/2" deep socket for the installation. You'll spend hours with the provided accessory tool.
There were a few stretcher pieces that had to have bumps chiseled off and sanded in order for them to fit properly. Other than that, installation went smoothly by myself.