Gulfstream 550 big boss seat
To give you the honest truth, i do not like the seating in any of the Gulfstreams that I fly.
The leather seats look really nice, but do not work as a eating seat, back is too far back, and gives no support.
As a reclining seat, say 60%, they are so slippy as to provide NO support to the body, so you are always having to push back up. Unless you are a small person and then can curl around, and fir on the actual seat......
As to a almost 100% recline, similar no grip problem.
The divan made up to a almost double bed is better, but not perfect, I can not actually sleep on it.
All crew rest areas I have tried are very bad, noisy often not practical to black out you can hear every word from the cockpit, every galley locker SLAM (you know just what I mean after one flight), every galley call. and not easy to sleep,
The best sleep on board, is actually the P1/P2 seat, plenty of stretch room, a nice side head rest, and no slip seat cover.
Just my 2500 hrs on Glf speaking.....
Glf