I've reached the cable portion for the Water and Stone Cardi. Actually, the modified length I'm making. The pattern makes this cardi mid-thigh. I just don't wear the longer sweaters year round; I'm sure I'll get more use out of a cardi which is shorter, so I've knitted to 15" from the armhole (instead of going onto 18"), and I think I may only knit an inch or two of ribbing, instead of 4".
I'm thinking of knitting a twisted rib though to make it more decorative than a regular rib.