I went to my music store to see if they had a stool with back rest called QuickLock or something like that. Yes, they had it, but it was now placed in the basement. One of the guys fetched it for me. He came up the stairs puffing and breathing hard, and said to me: "You don't want this monster, it will kill you." Point is, such stools are made to be comfortable, and they are sturdy, but heavy as h....So I bought a light folding chair to use on gigs, and at home I use an office chair that can be adjusted any way I like. But I have the keyboard in my hobby room, if you have it in a living room maybe an office chair is not what you want. I love that the guy in the music store was honest about that chair, in addition to being heavy it was not so easy to set up. I love sinplicity
But MUST have a back rest!