I got a HM Sayl. It is comfortable but it makes a racket of squeaks, creaks, and wailing noises every time I move. So much so that I try not to move at all during meetings these days. My previous $80 Staples chair didn't have this problem.
I've used quite a few Sayl chairs at my uni, I've never noticed them making any squeaks. Though my (2nd hand) Ikea marcus is pretty noisy. I think if you open up the chair and re-oil it it should be good.
Are the other HM chairs any better?