I was really surprised at the quality of this pergola. I'm generally suspicious of things of this nature when they advertise "high quality steel" and for good reason because it's normally flimsy tin! Noy this pergola! When I opened the boxes I blowen away at the thickness of steel. Assembly was a breeze for the most part. Only reason I give it 4 stars is because of the Assembly directions are about as clear as mud on the installation of certain bolts and we had figure it out on our own.