Hi.
My son ,who is nine w/ CF, had a Nissan Fundoplication when he was 18 months old. He also had a g tube placed at the same time. The fundoplication had to be "revised" (read:repaired) about 13 months later, but since then, no problems. Recently he has been getting a little "breakthrough" reflux, though an upper GI study shows the wrap (or fundo) to be intact.
He also takes both Prilosec and Zantac to control stomach acid and Reglan to decrease stomach emptying time.
All this to let you know that there were no complications and the procedures have definitely benefitted him. He went from < 5% to 50% for weight and maintains it with plenty of supplementation from his g tube-bolus and overnight feeds. His height is also 50%.
He has plenty of issues with coughing and his lungs, but his nutrition and growth are well controlled and he is not aspirating or experiencing significant reflux or related problems.
I don't think they recommend the surgery lightly and we dragged our feet,trying all alternatives, but once it was done it did change his life for the better.
Good luck with the decision and good luck to those who have already made it!