They still have some weight to them, but in comparison I guess they are a bit lighter. Co2 est's are they way to go, yeah they're expensive but if you're dropping $ on a CX, you might as well spend $ on the bindings that'll give you the most out of your deck. Or pick up a set of the discs and just run your cartels
The cartels i've got are est. have there been any dodgy breaking issues with the est bindings? mine have been fine, heard a few things on the hill and am starting to wonder if i am just lucky, or if they were just haters.