High wing - tick, but I don't know why? Tailwheel has the prop further from the ground at times.
Sealed strips - tick. My guess is that the crack in the fibreglass (not carbon on mine) started when the LE got a little ding on gravel some time ago (before I bought it). Hard to see in the black, back face.
Performance advantage - a little tick, slightly lighter.
Cost? When the overhaul is due I will compare the cost with the price of a new metal Hartzell.
I don't think my engine has counterweights.
Happy with it otherwise? Looks pretty. I don't do snap rolls or gyroscopic manoeuvres so the lower inertia is no advantage for me.