I've been using this chair for a couple of years now and love it. I first got it for work, but then ended up buying a couple for my parents. Like the Humanscale Freedom, the Liberty adjusts to your weight, applying the right amount of tension to your back and letting you shift into different positions with the right support. However, unlike the Freedom the Liberty has a mesh back which is cool and still supportive. And unlike most mesh-backed chairs (e.g. the Aeron), the Liberty back is made up of multiple pieces of mesh sown together to form a nice 3D shape (similar to how a suit obtains its 3D form from multiple flat pieces of fabric), so it does not need a separate lumbar support. Anyway, it's a great chair! Very sweet present, by the way. Good luck!