As other reviewers stated. The instructions were somewhat misleading. It's best to look at the diagram and make sure that you have the correct ends on the sections as you build them. Mine where wrong when I first assembled it and I had to break it down twice to get it built right. The door of the screen actually comes out closer to one of the poles and not centered like the instructions state. More room and not quite as stiff as a round , but in our opionion this was a plus for us. You get more of a workout. The boxes arrived torn up pretty badly, but turns out all the parts where there. Can't beat the price, when compared to what you could get locally.....