i do! i had to order a new one, since my last one was shot. honestly, the only time i get to sit down is at dinner time- the rest of the time, i'm on my feet. (even now, i'm on the treadmill ). it's 75cm, super big, which is comfy for me, cause i'm really tall. i can't say it's helping with position much, since my baby is still breech, but it feels really good and supportive, and i know it's helping my posture. it was really wonderful to sit on at the end of my last pregnancy, and i know i'll be thankful for it in the coming weeks.
the only drawback is that i'm SO FAR from my food on the dinner table!