I didn’t buy this umbrella for a balcony. I needed something extra for late afternoon shade.  
The umbrella seems pretty great.  The diameter of the pole is smaller than listed, though, because I used a 1.1/8” drill bit to cut through my shelf and that fit perfectly, and I also struggled to find an umbrella base with a fitting smaller than 1.5”, so the pole doesn’t fit as right and tight as it should.  Other than that.  It’s a cool umbrella that will serve it’s purpose.