I just purchased a E-Z UP ES 100s, and used it for the first time this weekend at a 2 day event. It is a significant upgrade from the tent I had been using, and so far it seems sturdy enough to last several years of 10 or more outdoor events per year.
I also purchased a mesh wall from flourish .com, and I find it to be a great system for displaying wall mounted objects.
One minor complaint is that I can't find anyone who makes banners that fit the banner sleeve that came with the tent.