This definitely prompts me to sit properly.  I am 5'3" I really have to scootch back for the lumbar to fit properly but my feet touch the floor and I do realize that I am sitting better.  Some days I sit for 8 hours - so I wanted to have better posture.  Ease of assembly went without a hitch.  Arms lifting up were a requirement of
mine as they won't fit under the desk - I don't really use the arms.  Have only used a few days, but so far I would say it serves my purpose and definitely cheaper than most I saw