Girsberger Presto, purchased after months of RSI pain and consultation with an ergonomist (not to mention a physical therapist, a yoga instructor, and any number of websites and books).

I write with my laptop, so that usually means planted on my sofa.

However, my best writing is on the train, so maybe it's all that lumbar support that's getting my juices flowing?

well ,
what about writing while you lay on the bed
:(

For me it's a comfy booth at Panera Bread.

Keep Writing!

I've got some back issues from a car accident several years ago, so depending on how it's doing I use a padded office rolling chair with lower back support, a reclining easy chair with a couple of pillows strategically placed for back support, and my bed. Ideally I'll move from one to the other every hour or two, but when I'm on a roll I can lose track of time and stay in the same place typing for 6+ hours without noticing, which is means increased back pain when I do get around to moving.

Not the one I'm in right now!

Aeron knock-off, ergonomically designed for perfect posture. Super comfy for slouching.

So Josh...how do you like the Ginsberger Presto? Worth $500?

I don't know. Ask my backache.

Phil, without a doubt, yes. I don't think everyone needs it, but I tried many different systems before finding this one. The critical features for me are vertical adjustment for both seat and arms and unlocked seat tilt (i.e. I can change the tilt while I'm sitting so I don't lock into one position.)

I used to use an Eames Management replica, which was stylish, but the seat was too deep and the arms didn't adjust. My writing partner uses one and likes it fine -- and she's shorter than me, so the seat depth isn't an issue.