I'm 5'3" and this chair's mesh design is offers great lumbar support at my computer. The blue foam color is so pretty! The seat is rock hard (much more so out of the box than on the store model). I will use a gel cushion for prolonged sitting. Leave the arms off as they are ugly and don't really serve a good purpose. I'm able to reposition much more easily without them and the chair pushes all the way into the desk. The brand is obviously a play on Humanscale but the name is where any similarity ends. I have one of each and this serves its purpose fine.
This chair suits both myself and my partner even though we are very different body sizes. I like the adjustments for height and lumbar support. I think that the mesh back fabric will be wonderful in the hot weather. I recommend this chair.
First impression upon use after purchase the cushion is not sufficient enough in the center I can feel the hard frame underneath. The recline is stiff and is only good if you need to stretch in the seated position. The height position is decent for long legs ( I am 5'7" with a 32" inseam) and am at a slight tip-toe at top level. The mesh back feels nice but I personally would prefer the arch slightly lower. I feel the current position causes me to hunch forward a bit (could be due to the seat cushion not holding up to my weight (198 lb.).