I have a carbon Legend (about 22 lbs. weight). I haven't paddled it too much yet, as I'm still trying to configure seat padding. The Legend seat chafes my back less than the Think Evo (which I've paddled for a year now), but still my backside needs custom padding care in many boat seats.
The water I paddle in is either flat, or pleasure boat/shipping wake coming from multiple directions.
The Legend is less stable in flatwater than the Evo, but still very stable compared to my Red7 2006-design Surf70 (33 lbs of carbon kevlar). I believe a good paddler (not me!) would appreciate the Legend's smoother feel that comes from less heeling moment on beamside swell compared to the Evo. One anomaly is that in short beamside chop it can have a jittery slide-slip, I guess due to the bottom being so flat. My Red7, also having a flat segment on the bottom of the hull, does this to me with much greater vengeance.
The Legend definitely feels faster than the Evo. Perhaps the narrower catch helps me get so much better posture that my improved stroke adds to hull speed compared to the Evo. In flat water the Legend feels slower than the Red7 (which feels as fast as a vintage K1 to me).
The Legend does seem to hold a diagonal track better than the Evo, even with my novice surfing skills, which is what I'd hoped with those hard chines.
I would have to say construction of all these boats seems superb. One exception is the Think footstraps, which seem to need a bigger washer in the center screw on both of my Think boats, eventually pulled completely through the footstrap fabric.
The Think leash attachment point is great for a calf leash (though not for a paddle leash unless you enjoy giving yourself an autowedgie when you huli). Not sure where I'll strap to my Red7 when I get brave enough to take it out in big water.
One thing about the Red7, fast and tippy as it is: the seat is super-comfy to me.