This chair is exactly what I have been looking for.  So easy to assemble, has a wide seat and a comfortable lumber back support.  Didnt want rollers because I get tired of the noise but this chair I can set in place and it stays and I just swivel the 360 degree seat.  You can change the height and the back tilts and you can lock in place very comfortably. The leather looks quite elegant. Pictures show the easy swivel and the simple adjustment parts.