We have only unpacked our 2 new umbrellas so I can't comment on durability.  They are very sturdy looking and of excellent quality.  We bought them to shade our balcony.  I think they will be excellent.  My only comment would be if you are hesitating between the 7.5 foot and the 9 foot, buy the 9 foot.  It does not extend out as far as I thought it would ( only one point is 4.5 feet).  I am sure we will get many years of use from our new umbrellas.