I used to nanny for folks who had a papasan chair, and their toddler was constantly getting himself into trouble by trying to climb on it - those things just aren't sturdy enough to serve as a jungle gym to an energetic climber. It toppled on him a few times (didn't hurt him, but certainly scared him) before I laid down the law: when I was there, nobody was allowed to touch the papasan chair. It was exhausting trying to keep him away from it. It was more trouble (and more of a space hog) than it was worth, IMO.
Also, FWIW, my DD would never tolerate being "sunk" into any chair like that to nurse, except maybe when she was a few weeks old. She usually doesn't even let me lean back in the chair/couch when I'm nursing her - I have to sit on the edge of the furniture, or on the floor cross-legged, in order for her to nurse without fussing. Also, I found it difficult to climb out of any furniture that you sink into - fluffy couches, etc. - when I was newly PP, so a papasan chair would not have worked for us.
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