I tried it on my BH and it was pretty trash with spin generation (I'm comparing it with Dignics 05), pretty hopeless if you love the chiquita and strawberry shots like me. You need full on loops to produce a lot of spin. However, it is very spin insensitive - my friend who loves BH punching found it to be really good in this area. Serve receive is of course much better than Dignics 05 due to its spin insensitivity, it was really easy to place pushes short or long.
Sorry if that would be the case objectively no pro would ever use V>15. But somehow we have several very high level pros using this rubber on both side. Meaning it definitly not the rubbers fault for you being unable to generate spin or high quality shots with it either way.
To give a little more insight:
As Manto pointed out correctly V>15 feels harder due to its harder topsheet. That is why you literally cant generate any speed with weak shots.
Although i would say i have a strong wrist and therefore flick, i still lacked in several departments while using this rubber on my bh(maybe now it could be different because i used it around 2 years ago and would say my bh improved) so i tested it on fh.
Here the story was completely different. Decent catapult, huge highend speed and strong spin capabilities + great sound (if that matters^^). The arc is really good, high enough to spin really low shots up in the air and get it on the other side. But not that long and wide that your shots would usually land somewhere behind the table.
So be aware that you have to have a strong technique, especially on bh if you want to use that rubber for that purpose. Finding its potential is way easier on fh.