Hydrofilm is about the best dressing I've ever come across, it is the only dressing that stays stuck to my wound on an area that has skin grafting.
Applying the dressing is almost a skilled job because if you are not carefull the dressing will flip under and stick to itself - and you won't unstick it. I made a mistake in ordering getting 10cm x 15cm when I really wanted 20cm x 15cm but I find that applying 2 of the 10cm x 15cm is easier with less creases and less chance of the dreaded flip under than the 20cm x 15cm
Currently I'm very happy