It has only been a short time since this surgery and all is going well. The biggest advantage of the mickey button over the peg tube is that we no longer have to deal with the ~10" tube that would get tucked into her diaper. She was starting to realize it was there and hold onto it during diaper changes, etc. There was always the fear of getting it yanked out.
So far the button appears to be more convenient than the tube. However, there are disadvantages to each. Apparently, the button needs to get replaced every so often (3 months-ish I believe is what the doctor said). For the first change, the doctor will do it, but after that parents typically change it themselves. I'm nervous about that, but I'm sure it will get to a point where that isn't a big deal.