Borrowed a frame over the weekend and floated the last few miles of the Dolores into the Colorado and down the Daily to Takeout Beach. Obviously can't comment on class IV conditions yet, but very impressed thus far. Lots of clever design features that Sotar and Aire do not have, such as 3 chambers per tube, 3 extra large handles per tube, and D rings mounted low to allow for basically any frame. I tested fitment on NRS yoke style frame and sport cat style frames, both fit easily.
Rows nice, very light, super sporty, and I'm thinking it's going to be a blast on bigger, techy sections. I'd take the 14' Kima over our Aire Wildcat any day.