*Personally I can't look Gisela on that portrait, IMO she looks much Wittelsbach and Gisela didn't take (IMO) very much of that side, she's more a Habsburg to me.
I can see why the Archduchess took control of the children from the start!
*I disagree in this topic a bit: Although she at least wasn't much better than the immature Sissi (I won't deny the fact that she wasn't prepared to take the role of Empress, wife and mother) despite her "experience". The Arduchess Sophie also commited big mistakes with her grandchildren, mainly with little Rudolph, when she appointed that awful tutor that she choosed and who wasn't the best option for the child. I think that she choosed to take the control of the kids since the begining for her domineering personality, not in vain she was considered the "real empress" on her time. She wanted all could be done as she said, she wanted to control everything. Although the topic isn't about Sophie, so I end here.
*About Sissi in old age: I also think that her extreme fast (she survived just with a few milk glasses and meat bouillon for many years) didn't help her to age well, possibly that made her to look much more old and damaged than she really was, well, just my thought. There aren't much photos of her (in good quality) of that time, but I agree with Jen, in her last photo of Switzerland she looks much (badly different) different than in her youth photos and that's why she became obssesed of not being seen or photographed because the myth of her beauty would have faded.