Set up and assembly was a breeze.  When I opened the package, I was concerned with the amount of screws and nuts, but putting it together was very easy.  The first screen had now damage or difficulty fitting screws into slots.  The second was bent in several places.  I could have returned, but I was still able to get it assembled.  As others have discussed, these need to be weighed down or anchored in some way when outside.  They were standing for all of 10 minutes before a wind gust knocked them down.  Added weight on top of the footings, and now they seem completely stable.