We just bought a sunbrella at Costco. It was $99. It has the little slits on top and a tilt top. We also bought a granite stand for it. We had extremely bad winds a few days ago and stood up just fine, though that could be due to the heavy base as much as the unbrella. Then I saw them listed in the Ballard's catalog for closer to $400. I'm happy with my choice as I could not see spending so much for an umbrella, though mine only came in tan and you got choice of color at Ballards. I also saw some in the new Pottery Barn catalog and they have several there in different colors as well in the $100+ price range.

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something like this will do a decent job but not perfect. I try to buy umbrellas with replaceable canopies, which I replace every two years or so, with a cleaning using this type product in the meantime. available at HD, lowes, et all

Thank you Vasmaven! - I want to adapt your idea. Are you still enjoying this set up? Has there been any issue or anything unexpected? I think that I will buy the SimplyShade Capri for this set up. My balcony is "enclosed" with 2 walls & floor & ceiling & is Southwest facing. My railing is a little less than 2 inches wide & 2 inches thick. I found a 2 inch "U-Bolt" (stainless steel, everbilt) at homedepot. Any advice would be greatly appreciated.