I'm knitting mine flat, not in the round. This does mean that I have to knit purl rows, but the rows are half the length. I'm knitting the back in ribbing which seems to give a good fit.
The real challenge comes in following the charts on motifs which are not symmetrical. Unlike horizontal Fair Isle bands there are no easy rows here. I have to give it my full attention. Still to come is the matter of continuing the pattern while decreasing for the armholes and neck. I'm thinking that I will draw the line on to a copy of the chart. We'll see.