This chair was relatively easy to put together (follow the instructions and you'll do fine!). It has quite a significant  lumbar support, but is just the right level of tension for me.  The chair height is adjustable by a gas cylinder, the wheels roll perfectly adequately, and the tilt control is helpful. The arms can either be up or down, which makes tidying it away at the end of the day easy.  It's quite a wide seat, which I like, and certainly more comfortable than my office chair in the office. The only thing to note is that the back support is not adjustable in either height or tension (but it doesn't claim to be).