This is a fine helmet. We have owned several adult and child helmets made by Giro for both ski and bike so we knew what to expect when purchasing.
This helmet is fairly light and comfortable. My daughter enjoys wearing it and has never complained about discomfort. The adjustment dial is very easy to use. Depending on whether my daughter has straight hair or braided pig tails, I can easily adjust this helmet while it is on her head.
In the end, I don't think there is anything amazing or terrible about this helmet. It's a good quality helmet with an easy adjustment system. I would have no problem recommending it to friends.