Great stickiness, but be careful with acrylic x-ray markers.
Great sticky-ability.  But beware if you have acrylic x-ray markers.  The acrylic markers will crack and even break over a short period of time because the stickiness is so strong, that you must force the marker from your marker holder.  So while the product itself is good, be mindful of the quality of the x-ray marker itself.
Rating: 4 stars