I'm not sure this would work as a stock photo. The composition is very central and the strong lines lead your eyes right up to the crisscrossed pattern in the centre. This would distract from any other material the photo was used to support.
Great vibrant colours. Excellent composition. Love the way you have captured the line structure of the umberalla. A few hot spots, however an excellent image overall. GL.
The bright light in the middle on the left side of the centerpiece is very, very distracting IMO. I love the colors of this, but I think they could've used a little help from PS with a bit more saturation to make them a bit more vivid.
These colors are fantastic without being garish. Nice design although I would have like a cropping to place the center a bit more to the left. Then the ribs of the umbrella would lead in to the center of the umbrella even more than they already do. I hope the spot in the upper right is on the umbrella and not in your camera.