After many years of hard shell kayaks, I had an accident and am experimenting with IK's to get back on WW.
I have a Thrillseeker and an Aire Outfitter 1.
Just got the Outfitter and took it out to the Nantahala for a few days a month ago. A fun IK for me. Great down the middle. Hitting eddies is taking me time to get in sync. Seems to me that the IK's slide into a eddy and if I weight the edge like I used to in a hardshell, the IK catches and almost flips over. I like the feel of the outfitter tho and enjoy it. IK's to me do turn but lots of slide to deal with zero carving for me so far.
The Thrillseeker seems to me to be a hi performance IK compared to the Outfitter. Great down the middle, surfs, relatively fast, does ferry moves well and while it does seem to slide into eddies if I set up well the boat does seem to do ok.. Nothing like my old hard shells did tho.
I have seen the Thrillseekers do some pretty gnarly runs right up there with the hard shells. Gonna take me a lot of technique work to get it even close tho.
The Outfitter seems to me to be just a fun hit the river type of boat that is stable as a rock. Which can be an awfully good thing.