I love love your choice of fabrics! Your quilt is very nice and I like the pipped binding as well. Your parents will really love having this in their home.
Kind of funny to me, when I see pipped bindings, is that when I made my second quilt I had no idea how to finish the edges. I actually made piping and finished it in much the same way as you have done with your quilt. I think the piping look really gives a nice finish and is more attractive than a regular binding. Sort of like putting matting around a picture. Great job!