What do you think about the "new" Purevax Feline rabies vaccine?

I put new in parentheses, as it has been a round since 2002. I am just hearing about it.

My vet used to offer a 2 year feline rabies vaccine fo $22. NOW, we get the new Purevax ONE YEAR rabies vaccine, for $28.

It is "supposed" to have the ingredient which causes fibrosarcomas at the injection site removed from it. We don't have a choice of which vaccine we want.

Just wondering what anyone else thinks.