I already had the chair without arms but decided to get the one with arms and am just as happy with it. I do use an additional gel cushion because there is not a significant amount of foam rubber in the middle of the chair.
I got this chair for home office. It seems very comfortable. I didn’t have a sore or tired back. It rolls great on laminate floor and easily goes up and down. Might buy one for my work office. If still on sale.