I work from, sitting straight for periods of 10-14 hours a day. I need a good chair and these are the best, however pricey. I decided to go with the Aeron by Herman Miller and chose Madison Seating for a refurb and I couldn't be happier. The chair came well insulated in a big box my children later turned into a playhouse. The chair parts are like new, you can't tell it's refurbed, one bit. That was my main concern because I've used these chairs at previous offices and you can tell when they have been used, but not this one. They carefully inspected and cleaned all parts. From the time I ordered it, my chair arrive in about 10 days. I love it.