I have some experience with those, yes.
Remember the zildjian earth ride? The rough rides are like that but heavier, sort of a mix between those and the first K custom ride, the one only labeled as "CUSTOM".
Sound wise, the crashes are a mix of the zildjian k custom special dry and brass cymbals - dry, short attack, short decay, little harmonics, little volume apart from the piercing attack.
Can't say I'd recommend them to anyone, and if you like that flavor I'd go for K custom special dry or Paiste sig dark energy, I haven't tried the Meinl byzance extra dry but I imagine those are going to be good quality cymbals.
Most UFIP aren't, at least as far as my tastes are concerned.
For reference, I mainly play paiste cymbals, B8 and B15.