My daughter got one of these dollsand while it does take 6 AA batteries, it does fly quite well. The problem is recharging the damn thing.
The on/off indicators on the base and the doll are miniscule and I had to pull out the instructions to figure out in which order and position to flick the stupid buttons in order to charge the fairy. To save myself this aggravation every few minutes, as well as the aggravation of having to change 6 batteries every day because I left some button in the wrong position, I took a Sharpie marker and labeled each button.
fly & charge/off for the base
fly/charge for the fairy
And I learned from the instructions that you can control her descent by flicking the big button.