We opened the umbrella on 610 and at first we were very happy with it, but less than 2 months later the tiki thatch material (cheap pom pom type plastic) disintegrated almost all at once filling up debris in our pool skimmer and leaving large bald patches all over the umbrella.  Very surprised to see how fast all of the thatch disintegrated once it started, given there were no signs of it before it started.