What’s your first impression of this name?

I’ve fallen in love with the name Millie for my daughter. I’m wondering what people think when they hear this name? Does it sound beautiful to you? Too cutesy? Old fashioned? Like a nickname? Do you think it ages well? Would look good on job applications? Would you like or dislike if your parents named you this? Stuff like that

I’d really appreciate any comments you have about this name, whether they’re positive or negative. Thanks in advance!