Purchased this for a fire pit/table and seating set we have because I didn’t want several separate covers. Great fit with the chairs pushed in. The cover arrived just before a storm that dumped a few inches of rain. No big puddles on top and dry cushions beneath because it stayed in place. I like that it clips to the chairs so I don’t have to worry about it 'escaping’ when it gets windy. I have a separate fire pit cover from this manufacturer and it hasn’t blown away and has lasted through two very icy winters - which is why I wanted one of these for my patio set.
(The conditions used in below is noted for the fire pit cover.)