This name is so ridiculously long that it looks extremely pretentious and pompous. It's a bit of a mouthful and honestly, we all know everyone will shorten her name to Max as NO-ONE would bother to say it full. I recommend the more practical name 'Maxine'.
Maximiliana is a super long, sorta hard to pronounce, BEAUTIFUL, RARE, name. I love it. I love the nicknames: Milli, Ana, Liana, Max, Maxie. I love this name to death.