At home I usually sit on an old couch with a semi-circle of laptops on laptop arms in front of me. Unfortunately, while the couch is great for sleeping or just lying on, where I prefer to sit it is dying and slumping badly. However, this has more than made up for it and I am now back slightly higher than before and with my back again with the right posture. It is also very comfortable while firm, my preference.
I have to commend Homescapes on excellent delivery, for even though I opted for 3-5 days delivery, I got it next day.