It's just OK, for the price.  Bought this based on the top vent - I live in a windy area - but not really satisfied with the purchase.   The frame is very light and the entire umbrella rocks back and forth, making creaking sounds, in even a medium breeze.  Plus, the fabric is much thinner than other umbrellas I've own or seen.  We'll use it for this year and them buy another one, FROM A DIFFERENT RETAILER, next year.   Live and learn!