Opinions are generally mixed about the I4's, one of the reasons Dye are continueing the production of the I3 pros.
They are with out a doubt the smallest, lightest and tightest goggles on the market but because Dye have taken all these principles to the extreme, they are not going to be loved by everyone.
Personally I love my I4's they're super comfy with the most amazing field of view i have ever experienced while wearing a PB mask. And i also think they look the nuts.