Saw it two times already, both times in HFR 3D. It IS
a strange experience, but I didn't notice it as much the second time.
I agree with others who said that HFR is a bit out of place in a LotR prequel/sequel, but would have been awesome for films like Avatar, Prometheus or Avengers.
I'm going to see the 2D version soon, seems to me like that one will look exactly like the LotR films.