I have used the fading water soluble pens on a couple quilts no problem then I have one, a king size Cathedral Windows that the markings never came out of the border.
I now use the heat pens where you iron out the markings. I have heard that some people have problems with a tale tell marking that remains. To date I have had no problem. I do not use them on white though just out of fear of leaving a residue. On white I have been using Press and Seal. That is a bit bulky for me but it works.