Make sure to mark the beginning and end of lace pattern with stitch markers: otherwise you’ll be totally lost when making the collar/shoulder increases.
The instructions seem to be quite wordy and complex but the knitting is simple: kf&b (increase 1) on both sides of markers i.e. add one sts on both fronts, two on sleeves and two on back … and for sleeve increases add 2 sts per sleeve.

The cardigan turned out really cute. I left our the back lace and only knit the lace pattern in the front. I like the fit and I’m sure I’ll wear it a lot at the office. It weigh’s almost a kilo so certainly a winter cardi :-D