I have the EZ up Dome II, and has been great so far. However! some pop ups, have vertical legs, and some slanted. In other words, the footprint could be a 10x10, and the upper 8x8. My quest for finding matching solid, or screen wall options has not been easy to find for the EZ-up.
Although, you can order the walls on the EZ up website, it is costly (this is my only complaint). I tried Walmart's First Up screen wall (approx. $36, reasonable) but it only fits a square vertical 10x10. I thought I could cinch it up at the top, but got frustrated in doing so.
Len, you didn't include the Walmart's First Up pop up on your poll. The off the shelf options would fit what it was made for. People who have the First Up seem to be satisfied with it. It would be nice to put the screen walls up for an insect free eating area! I have found an inexpensive wall for my EZ-up Dome, but have not ordered it yet. I think it was at Cabella's
For the above reasons, I also ordered a Pahaque screen room tent. It was a very nice system. It just had to many parts to deal with. A versatile screen room with solid wall also. One of the tent pole anchor ripped out the seam on my first trial set up, and used that excuse to return it. Campmor, was very gracious about taking it back, and even paid the shipping return. Would do business again with Campmor.
I have had the EZ up for a long time, I can't remember, 10yrs +. If I had a reason to buy another, it would be with straight legs.