Does any one have experience with this product? New Construction 2×6 walls Zone 6 . I have 2in polyiso on the exterior.  I intended to use mineral wool, but looking at prices and promo vids for Owens. I am thinking of using there R-21 unfaced Next gen batts. Almost half the cost of mineral wool. Yes a little bit less R value. Heat is wood and mini splits. My questions is it vapor permeable/ dry abilities? With the poly iso on the exterior I intended to have my walls dry to the interior. With this be a problem? I read a article under the search functions. and I seems it would be a ok choice. But things are always changing. This will be installed by me. 

P.S I would also be using this but double the layers in the cathedral ceiling(2x12s) , and two r-30 batts in the flat celling portions. Home is very well air sealed.
Thanks Chris