We have 2 EZ UP 10X10 and a 12X12 ?? (don't remember the name) We also have weights for the legs, but have never left them up over night or if the wind comes up..
I see several canopies a year that are mangled by wind. Most were not stacked or weighted down. So I started collecting frames and pieced some frames together. What I have found is that the EZ UP canopies are made up of heavier metal. Now they do make light weight ones also. If you are going to use it a lot, the EZ up canopies are superior to most all of the others on the market.