Ultra light and excessively comfortable. 

These bindings are near perfect. They are probably the lightest bindings I've ever used to date (even lighter than my C60's). The reason that the CO2's are lighter than the C60's is probably because the high-back of the CO2's are substituted with Air-Mesh instead of a conventional solid material high-back.

Also, unlike the C60, which features the Ultra-Strap, the CO2's have the super plush and comfy straps featured on the P1's. I definitely prefer the CO2 straps 10 times better than my C60 straps. On the down side, I felt that the cap-straps on both bindings were made and designed pretty poorly. The quality and durability in the cap-straps are quite lacking considering the binding price, and their shape might not fit every boot out there.

All in all, the CO2 is so unbelievably light that I could almost not even feel the weight. In addition, the B3 gel in the heels, plus the plushiness of the ankle straps made this the No. 1 binding I have ever tried in terms of comfort. The built in FLAD dials also look very technical. In the end, these bindings are extremely comfortable and I would take these over the C60 any day, dollar for dollar, pound for pound. Plus, the lime green colour is just too sweet.