It is impossible to sit straight. You would think that the front edge of the seat would be parallel to the backrest, but not in this chair (even after disassembly and re-assembly). So now if the seat cushion and armrests are facing straight at my computer, if I lean back into the backrest, on contact it naturally turns my back/head so that I'll be looking at the empty space to the right of my computer monitor. I don't think they were careful when putting the holes in the seat cushion where the screws go in to connect it to the backrest.