Took only 2-3 minutes to put together.  Well-packed. I agree with other reviewers that the lampshade is a little small proportionately to the scale of the lamp. 

Several of the questions and answers addressed the height from the lampshade to the ground, and I believe I saw 45"-50" as the height range from the ground. This is not accurate. I am 62" tall and I am able to walk under it with at least 6" of clearance when it is extended all the way. 

Adjustable height means the last section of the arch pulls out - so the wider the arch becomes, the more the shade comes down. 

I do NOT see a way to keep the arch width the same and move the height up and down. 

Love this lamp. Only $28 more than
The Target one half it's size, and definitely much higher quality!