I am impressed with the CX70 canti's.
My favorite part of these are the nicely made pivots which eliminate play on the canti stud - makes for solid and quiet braking. I use dura salmon pads with a little toe-in. Setting these up is relatively straight forward as canti brakes go. I bent the springs a little to give the right lever resistance.
Compared to other canti's I've used:
-similar function to Bruce Gordon canti's, but nowhere near as pretty.
-a little better than the IRD Cafams, which are very nice.
-much better than TRP EuroX and CR720s.