Here is my feedback on the Cable-8 pattern from Interweave Knits...
I stopped about 6 rows short, mine was becoming too long.
The first time I crocheted the edges it was a little loose, crocheting those crocheted seams together gave the effect shown on the top
on the bottom is where I crocheted on the edge EVERY OTHER stitch rather than every stitch. Then I whip stitched the seams together rather than crochet them together. (I did crochet the shoulder seams together as called for)
See the difference!
Next I tried the crochet edge on the sleeve... I might have done it too loose, but I think it looks much nicer without any edging. The single crochet that went over that area on the sides looks fine for finishing. I am leaving it without any more crochet.
Here is a photo of one side crochet, and other without
If you are making this an think that it might be a little snug when you hold the first piece up to you, no worries, the crochet edging adds an inch to each side. Mine fits just right. Also consider not crocheting anything except one round of the arm holes after finishing like a normal knit garment. I'm not sure I see the benefit of crocheting all edges. At the shoulders, the cables don't connect with the crocet interupting at the seam.