I've taken it for a few years and LOVE it. It's my 3rd try at antidepressants and it's perfect. It has fewer side effects than most ADs. Not that it's a concern to your daughter yet (hopefully) but I've taken it through pregnancy and breastfeeding with no ill effects.
I think all ADs work differently for each person. She may not like it and have to change a few times, but there's nothing wrong with that. I was 20 when I had my first bout with ADs and they didn't work, but I didn't know how to tell people and was afraid of the consequences if I did. It's a very hard and confusing time and I didn't have a supportive family nor anyone outside of the psych office to talk to. I'm so glad to hear that you are researchin for her and supportive (I'm assuming). Whatever you do, make sure she knows there is nothing "wrong" with her and she's not alone! There's tons of people who don't get the help they need.