perfect height add on there.KJcachers said:1 more note on the First Up. They are intended to be used with the legs going straight up. so 10x10 means 10x10. Some of the EZ ups have the legs slanted towards the top. so they may be 10x10 at the base of the legs but will be smaller under the canopy. Also, if the legs are slanted and the round type they have a tendency to collapse inward and fail under high winds. (ask me how I know)
Lastly, The windwalls and screenwalls of the First Up also help keep the legs up and hold everything in place. We used ours with the wind wall a few weeks ago on our first outing and it worked great in a pretty bad storm.