Make sure you have an Allen wrench!  Also, screws do not align. We used a hammer, wonder bar and screw driver. Works fine and directions are easy. Not for folks with no assembly skills.
We used a ratchet which helped until you get to the cross bars. There is a separate Allen wrench for that which may fit a ratchet.
There should be a way to hook the back pillows to the sofa. These are sure to blow away.
Otherwise comfortable and easy to move around.