I have the older model of the HM Aeron. In my opinion this chair has been the best thing I've done for myself.
I had a cheap office chair that I got at the Office Depot. I felt tight and tired almost all the time. But once I started to use the HM it has been great!
Sometimes I am sore from riding but after sitting on this chair for some time I feel much better!
How is this for free advertising?