I love our Tojagrid pergola. We purchased the 6x6 frame which I picked up at Home Depot. Very sturdy brackets. The only issue we had was the instructions on putting it up. It took 4 strong men to lift the roof once it was put together and definitely not in 15 minutes. We were told later that those instructions were for the 4x4 posts but that should be stated a little more clearly. It is definitely a nice looking structure and worth all the sweat.