After using this for a few months we had to buy a table and lengthen the pole holder to keep the umbrella from toppling over in a breeze.  I would only purchase this for a balcony that is closed on 3 sides and only opens one.  My half umbrellas are much sturdier as one side is against the house keeping the wind from getting under it and lifting it up.  Buy the heaviest base you can if you buy the one!!