Let's talk about the positive attributes first:
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1) VERY affordable - best bang for your buck.
2) I never thought I would care to have a clock or thermometer on my umbrella - but my friends and family have REALLY enjoyed this feature. Also, the instructions that came with the electronics for the umbrella are actually VERY useful and are in easy to understand English!!! (I hate to use instructions)
3) I have always had wood umbrella poles - and these are metal. At first, I wasn't thrilled - but they really stand up to the unexpected wind gusts much better than the wood counterparts (which have snapped on previous umbrellas I have owned)...
4) Thus far, the crank mechanism works very well.
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Now for the less than perfect attributes:
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1) The green umbrella material is quite shiny. I wasn't expecting them to have a polyester luster (not a good thing). It's not a deal breaker... but you should know that the green is a very vivid green (more like a Green Crayola crayon, than the "forest" green I was expecting).
2) The LED lights aren't glued into the frame -- so each time, a few shift and move out of place (easy remedy - a glue stick). Also, they are very YELLOW - I don't know why I expected them to be a white or soft yellow that glowed white - but they are YELLOW and they glow YELLOW (everyone looks a bit jaundice). The mode where they flash randomly is, as others have mentioned, annoying - and to be avoided at all cost (I'm imagining my guests having seizues!!!) -- but when they are on solid - they provide good light. Another thing about the LED lights -- I wish that they were operating off of a battery pack (why not? the temperature and LED controls run off a battery???). In order to use them - you have to run a cord out to the table (good design, however, the connection is made under the table but above the umbrella stand). I have a toddler, and I don't like the trip hazard to the table. Also, if your guests are drinking...................... same problem. In the end, I use the umbrella without the lights.
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Unknowns:
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1) I have not operating the tilting mechanism, as I have no need for it. Could be great, could be a problem... I just don't know.
2) I haven't tried to clean off the fabric, either - so I don't know how well that works.
Hope that helps. All in all, however, I am VERY pleased with this purchase.