I have used a Disney Authorized Vacation Planner my last 4 trips. The main reason I use one is if a promo comes out such as
free dining, then she will automatically call Disney and have it added to my ressie. This is important to me because between my work not allowing us to carry phones and my kids' schedules, I may not be able to call first thing. They also usually give a token of appreciation like a Disney gift card or in room gift. Sometimes I make all my own ADRs but if its a hard to get one, I may have her try as well. This trip we both tried for BOG-she got a 6:30 and all I got was an 8:30. I kept hers and cancelled mine.