Impossible to assemble. Do not buy!
Update: I decided to give it another try. Step 1 is to attach the back to the seat. That was the problem. Alligning the bolts through the back and into the hidden nuts in the seat proved impossible. The solution was to use one of the longer bolts (used elsewhere in the assembly) to attach the two pieces together using the hole in the center. This proved easy. Snugged it down. Then inserting the shorter bolts on the side was easy. Removed and replaced the long center bolt with the correct one. The rest of the assembly was easy.
Ease of assembly: 1 star
Sturdiness: 5 stars
Comfort: 3 stars
Edit: Can be assembled by an engineer.
Impossible to assemble. Do not buy! Update: I decided to give it another try. Step 1 is to attach the back to the seat. That was the problem. Alligning the bolts through the back and into the hidden nuts in the seat proved impossible. The solution was to use one of the longer bolts (used elsewhere in the assembly) to attach the two pieces together using the hole in the center. This proved easy. Snugged it down. Then inserting the shorter bolts on the side was easy. Removed and replaced the long center bolt with the correct one. The rest of the assembly was easy. Ease of assembly: 1 star Sturdiness: 5 stars Comfort: 3 stars