We have the 13' octagon cantilever umbrella. I would not recommend buying this.
It frequently gets stuck trying to open it and the bar comes off the track all the time. It was $1,500 and is only 4 years old. In the process of trying to get service for it. Poor quality and very disappointed.
Also you cannot use the umbrella in any sort of windy weather for fear of it blowing over. Any sort of breeze has it flapping like crazy.
Seems pointless since a gust of wind can happen at any time. Also the base is filled with sand and would be very difficult to move should you decide to rearrange your seating area.
Review about: Treasure Garden Umbrella.
Reason of review: Bad quality.
Preferred solution: Let the company propose a solution.