I just did mine again over the weekend as I wanted the front a bit more feathery than it was the last time I MNetted it and I'm really pleased with it. I do have a slight fringe but at the sides so not a scary fringe. I have very fine hair and it works for me although I have to straighten.
Your dd looks lovely and as someone said you can always stick a few hairslides in to tone it down a bit if it's bothering you.
The MN haircut rocks. I have a hairstyle for the first time in 20 years!
It's very easy to keep especially if you've got straight hair to start with . I trim it every two to three months but only because i like the layering at the front. If you keep it fairly long then you don't get the shorter layers that I like. But for a 7yo I would keep it a bit longer and it'll be lovely (and cheap!)