Took me three attempts to get cast on for the Cog's ribbed jumper. The resultant front came out quite long and thin (but it's designed to stretch). I used a waste yarn cast on - I'm hoping the final cast on won't be too wavy.
Later on the neck fell off when I tried to put it onto waste yarn. Ack. Still, got there eventually.
I always like to knit the front first, now. If I'm not happy with the fit, there's no point in carrying on with the rest of it.