This umbrella came with a listing of caveats which, if they had been listed on the Wayfair advertisement, would have made me think twice about buying it.  With only a very gentle breeze blowing, the umbrella waves rather wildly and becomes unusable.  The caveat listed for that characteristic is Do not use in storm.  I would expand that to include any breeze.  Also, the umbrella is not waterproof so it cannot be relied on to protect any dishes etc that may be on the table in case of an unexpected shower.  All in all, this product, which costs roughly ten times the cost of a simple umbrella that is typically used in many tables (I am including the cost of the base in this comparison), is a source of unnecessary anxiety and permits only restricted use.  The only reason I bought it is that our table does not accommodate a conventional umbrella.  However, on a calm day with no rain in sight, it does provide a large shaded area over the table, so I gave it two stars.