Very good design. The anchor points are braced with a metal plate ( brilliant idea) 
Very easy to install 
I wish they would add additional anchor points in the plastic to fit most standard house build where 16” or 12” between posts . This way we could screw the system into solid wood posts instead of using the plastic inserts. the current 730mm center to center is an odd distance. So I have secured one end in a post and the other one using the plastic insert