As someone who uses a chair regularly...
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No back support. Whoever sits on that will be hating life in less than 20 minutes.
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Leaning to make the chair move, what if I'm just uncomfortable and need to change position?
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The little caster wheels at each corner are useless and will get caught on any imperfection in the road or texture change, bringing the chair to a halt.
Did they actually, you know, talk to any disabled people while designing this?