Not that difficult to put together, however, ALL the screens have to be closed in order for the  screen enclosure to remain secure. If even one side is not zipped all the way closed all sides will fly in the wind. I anchored mine on a deck with screws. 
There is nothing securing the enclosure at the bottom. I’ve only had this for two days. Not very secure that this will keep the bugs away. More of a 75.00 tent than a screen enclosure.