Putting it together was a challenge.  As mentioned before, the pre-drilled holes in the back were too large so the washers for the screws would go right through them. The screw inserts on the side piece were misaligned, so even if the back holes were the right size, they still wouldn't have fit. Finally, one of the screw inserts was too small so even if you could line the screw up, it would not have threaded.

Thankfully, the piece is made of hardwood so I used 4 wood screws with washers to attach the back and side piece together.  I also had to remove the seat to get the side piece to slide in properly.

After it was all finished, the chaise lounge looks great, stores things nicely and is comfortable.  Suggest spending about 5 minutes with the screws provided.  It they don't work, use wood screws.