Used them on the 2015 r3 roadster in the UK, when I was selling the bike with around 5000miles on them there was plenty life left in them.
I like cobras and I'm happy they put them on the new r3s
So far have done 1500km on my GT and I am happy with the tires.
No rubber burning, harsh acceleration ( maybe sometimes ;-) ) etc
and so far they are looking and performing good.