Just balled in the JC2 and they are my new favorite shoe. If you have wider feet you will love these.
I will say traction is not as good as Kyrie 1s or Kobes, but for me the fit is so much better. I went true to size and they are perfect, no blisters, no foot cramps, just a broken in feel with perfect lockdown in the ankle/heel. My foot feels so well cushioned in these and the knit feels like it makes them more responsive.
I said this before about sizing...if you have wide feet or are on the big end of your size, go true to size. If you have narrow feet or even if you feel like you are on the small end of your shoes, go 1/2 down. For a comparison, I wear 9 1/2 in Kyrie 1s and Kobes, but they fit like a glove and I could probably size up in Kyries, as my wide feet cramp in them. The 9 1/2 jc2 fits perfectly with the length being closer to a 10.