That was me. Dr. Vicente did the Botox last November. Procedure was very quick, as was the recovery, though we did see some eyelid droop for about 2 weeks after the procedure. This is not uncommon and was discussed with us, but it was a bit annoying for our daughter. Overall it seems to have been fairly sucessful--her eyes continue to be pretty straight.
The main advantage I saw to trying Botox is that it is minimally invasive and, unlike surgery, leaves no scar tissue. That, I understand, can be a real issue if the surgery has to be redone.