Hi Mick
It is an entirely subjective thing, but I like the effect it has upon certain pictures. It won't work for everything. Record shots or street photography are unlikely to benefit from using this paper, I would suggest, although maybe portraits would work quite well - depending on the style etc.
It's about careful control of the tones for - it won't work with muddy tones, at all. And shadows need to be quite open and high in detail, otherwise they get lost in the sheen.
I think the paper also either benefits from images that are either entirely impressionist in their blur, or alternatively biting sharp - any in-betweens look wrong somehow.
that probably doesn't give you anything tangible to go on, but it's hard to explain fully my change of mind.