It’s comfy but a little smaller than I expected. I’m 5’7 and the chair is a bit lower for my height but not to the extent of being uncomfortable. Of course the Important feature is the back massager, needs a power source but because it’s a usb type A you could connect to a variety of sources, your laptop, power bank, mobile phone adapter, etc. 

The massager operates in 3 modes low, high and Turn Off and the button is on the armrest convenient and very very surprisingly lightweight.