Been using one for about 3 months now, pretty good so far (use a Herman Miller Mirra at work)
lots of adjustability.
went through around 3 padded chairs in the last couple of years and decided to use a mesh.
This product features:
All Mesh Ergonomic Design
3D Headrest with Hanger: can be adjusted forward,backward,angle,up and down
Back height can be adjusted In 5 stages with 6CM distance
Seat: Slide can be adjusted in 3stages and height can be adjusted in 10cm distance
3D armrest: Height, left and right, front and rear adjustment
Back tilt lock in 3stages and strength can be adjusted
Is the base plastic or steel ?